diff --git a/common/modules/swh-adoption-academic.org b/common/modules/swh-adoption-academic.org
new file mode 100644
index 0000000..ff4c9d9
--- /dev/null
+++ b/common/modules/swh-adoption-academic.org
@@ -0,0 +1,83 @@
+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+INCLUDE: "prelude.org" :minlevel 1
+
+* Adoption in Academia
+  :PROPERTIES:
+  :CUSTOM_ID: main
+  :END:
+** Adoption is coming ...
+  :PROPERTIES:
+  :CUSTOM_ID: adoption
+  :END:
+*** HAL software curated deposit workflow                           :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .55
+    :END:
+    [[https://dx.doi.org/10.2218/ijdc.v15i1.698][/Curated Archiving of Research Software Artifacts/]]\\
+    International Journal of Digical Curation, 2020
+*** Reference archive for swmath.org                             :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: .45
+    :BEAMER_OPT: pic=swmath-logo.png, width=.7\linewidth, leftpic=true
+    :END:
+     See /code/ links, e.g. [[https://swmath.org/software/7116][SemiPar package]]
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** IPOL (image processing)                                      :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=IPOL_SWH.png, width=.3\linewidth, leftpic=true
+    :BEAMER_COL: .34
+    :END:
+    - archive (deposit)
+    - reference
+    - [[http://www.ipol.im/pub/art/2020/300/][BibLaTeX]]
+*** eLife (life sciences)                                        :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=eLife-logo-square.png, width=.45\linewidth, leftpic=true
+    :BEAMER_COL: .35
+    :END:
+    - archive (save code now)
+    - reference
+*** JTCAM (Mechanics)                                               :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .33
+    :END:
+    - [[https://jtcam.episciences.org/page/for-authors][instructions for authors]]
+    - biblatex-software in journal \LaTeX{} class
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** Policy: France                                               :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: .35
+    :BEAMER_OPT: pic=swh-OpenScience.jpg, width=.6\linewidth, leftpic=true
+    :END:
+    /National Plan Open Science/
+*** Policy: Europe                                               :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: .3
+    :BEAMER_OPT: pic=EOSC-SIRS-report.png, width=.4\linewidth, leftpic=true
+    :END:
+    /EOSC SIRS report/
+    - SWHIDs
+    - archive
+*** Guidelines                                                   :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: .35
+    :BEAMER_OPT: pic=swh3steps.pdf, width=.6\linewidth, leftpic=true
+    :END:
+     - [[https://www.softwareheritage.org/save-and-reference-research-software/][summary]]
+     - [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]]
diff --git a/talks-public/2021-01-11-RRPR/2021-01-11-RRPR.org b/talks-public/2021-01-11-RRPR/2021-01-11-RRPR.org
new file mode 100644
index 0000000..ca193d7
--- /dev/null
+++ b/talks-public/2021-01-11-RRPR/2021-01-11-RRPR.org
@@ -0,0 +1,432 @@
+#+TITLE: Archiving and referencing all the software source code
+#+SUBTITLE: a foundation for reproducibility
+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+BEAMER_HEADER: \title[Preserving source code in Software Heritage]{Preserving source code in Software Heritage}
+#+AUTHOR: Roberto Di Cosmo
+#+EMAIL: roberto@dicosmo.org
+#+BEAMER_HEADER: \date[11/01/2021]{RRPR 2020}
+#+BEAMER_HEADER: \author[@rdicosmo~~~~Roberto Di Cosmo~~~~@swheritage~~~~~CC-BY 4.0]{Roberto Di Cosmo\\Director, Software Heritage}
+#+KEYWORDS: software, heritage, legacy, preservation, knowledge, mankind, technology, prospective, software development
+#
+# prelude.org contains all the information needed to export the main beamer latex source
+# use prelude-toc.org to get the table of contents
+#
+#+LATEX_HEADER: \usepackage{tcolorbox}
+#+LATEX_HEADER: \definecolor{links}{HTML}{2A1B81}
+#+LATEX_HEADER: \hypersetup{colorlinks,linkcolor=,urlcolor=links}
+#+INCLUDE: "../../common/modules/prelude-toc.org" :minlevel 1
+
+#+INCLUDE: "../../common/modules/169.org"
+* Introduction
+   #+INCLUDE: "../../common/modules/rdc-bio.org::#main" :only-contents t :minlevel 2
+* Software Source Code is knowledge
+** Software source code: /human readable/ and /executable knowledge/
+  :PROPERTIES:
+  :CUSTOM_ID: softwareisdifferent
+  :END:
+*** Harold Abelson, Structure and Interpretation of Computer Programs \hfill (1985)
+    /“Programs must be written for people to read, and only incidentally for machines to execute.”/
+#+BEAMER: \pause
+*** Apollo 11 source code ([[https://archive.softwareheritage.org/swh:1:cnt:0c1741c1fb0150f111625d02277407f628c31bac;origin=https://github.com/virtualagc/virtualagc;visit=swh:1:snp:cdcd2bc43331a436e8c659ba93175ef7d7eb339b;anchor=swh:1:rev:4e5d304eb7cd5589b924ffb8b423b6f15511b35d;path=/Luminary116/THE_LUNAR_LANDING.agc;lines=244-260/][excerpt]])                     :B_block:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: 0.48
+    :BEAMER_env: block
+    :END:
+   #+LATEX: \includegraphics[width=\linewidth]{apollo-11-cranksilly.png}
+   # excerpt of routine that asks astronaut to turn around the LEM
+#+BEAMER: \pause
+*** Quake III source code ([[https://archive.softwareheritage.org/swh:1:cnt:bb0faf6919fc60636b2696f32ec9b3c2adb247fe;origin=https://github.com/id-Software/Quake-III-Arena;visit=swh:1:snp:687ac8cdbfab3b78b7f301abee5f451127f135fc;anchor=swh:1:rev:dbe4ddb10315479fc00086f08e25d968b4b43c49;path=/;lines=549-572/][excerpt]])                           :B_block:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+   #+LATEX: \includegraphics[width=\linewidth]{quake-carmack-sqrt-1.png}
+   # smart efficient implementation of 1/sqrt(x) on a CPU without special support
+#+BEAMER: \pause
+*** 							    :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** Len Shustek, Computer History Museum \hfill (2006)
+    \hfill /“Source code provides a view into the mind of the designer.”/
+   
+*** Distinguishing features					   :noexport:
+    - /executable/ and /human readable/ knowledge (an /all time new/)
+      + even hardware is... software! (VHDL, FPGA, ...)
+      + /text files are forever/
+    - naturally /evolves/ over time
+      + the /development history/ is key to its /understanding/
+    - complex: large /web of dependencies/, millions of SLOCs
+*** In a word							   :noexport:
+    - software /is not just another/ sequence of bits
+    - a software archive /is not just another/ digital archive
+** Software Source code: pillar of Open Science
+*** Three pillars of Open Science :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .4
+    :END:
+#+latex: \begin{center}
+#+ATTR_LATEX: :width \extblockscale{1.2\linewidth}
+file:PreservationTriangle.png
+#+latex: \end{center}
+#+BEAMER: \pause
+*** A plurality of needs :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .6
+    :END:
+    - Researcher :: 
+     - *archive* and *reference* software used in articles
+     - *find* useful software
+     - get *credit* for developed software
+     - verify/reproduce/improve results
+ #+BEAMER: \pause
+    - Laboratory/team :: track software contributions
+     - produce reports / web page
+ #+BEAMER: \pause
+    - Research Organization :: know its *software assets*
+     - technology *transfer*
+     - impact *metrics*
+** What is at stake \hfill in increasing order of difficulty
+   #+INCLUDE: "../../common/modules/swh-ardc.org::#ardc" :only-contents t :minlevel 3
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+\vspace{-.5em}
+#+BEAMER: \pause
+**** 
+    We need an infrastructure /designed for/ software source code \pause \hfill /now we have it!/
+* Software Heritage
+** Software Heritage, in a nutshell
+#+BEAMER: \transdissolve
+#+INCLUDE: "../../common/modules/swh-goals-oneslide-vertical.org::#goals" :only-contents t :minlevel 3
+** The largest software archive, a shared infrastructure
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.7\linewidth
+   file:SWH-as-foundation-slim.png
+   #+latex: \end{center}
+   #+BEAMER: \pause
+   #+latex: \centering
+   #+ATTR_LATEX: :width \extblockscale{.9\linewidth}
+   file:2021-01-archive-growth.png
+** Addressing the four ARDC needs (see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] for details)
+   #+INCLUDE: "../../common/modules/swh-ardc.org::#swh-ardc-short" :only-contents t :minlevel 3
+* Demo time!
+** A walkthrough
+   - Browse [[https://archive.softwareheritage.org][the archive]]
+   - [[https://save.softwareheritage.org][Trigger archival]] of your preferred software in a breeze
+   - Get and use SWHIDs ([[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][full specification available online]])
+   - Cite software [[https://www.softwareheritage.org/2020/05/26/citing-software-with-style/][with the biblatex-software style]] from CTAN
+   - Example use in a research article: compare Fig. 1 and conclusions 
+      - in [[http://www.dicosmo.org/Articles/2012-DaneluttoDiCosmo-Pcs.pdf][the 2012 version]]
+      - in [[https://www.dicosmo.org/share/parmap_swh.pdf][the updated version]] using SWHIDs and Software Heritage
+   - Example use in a research article: extensive use of SWHIDs in [[https://www.dicosmo.org/Articles/2020-ReScienceC.pdf][a replication experiment]]
+   - [[https://doc.archives-ouvertes.fr/en/deposit/deposit-software-source-code/][Curated deposit in SWH via HAL]], see for example: 
+      [[https://hal.archives-ouvertes.fr/hal-02130801][LinBox]], [[https://hal.archives-ouvertes.fr/hal-01897934][SLALOM]], [[https://hal.archives-ouvertes.fr/hal-02130729][Givaro]], [[https://hal.archives-ouvertes.fr/hal-02137040][NS2DDV]], [[https://hal.archives-ouvertes.fr/lirmm-02136558][SumGra]], [[https://hal.archives-ouvertes.fr/hal-02155786][Coq proof]], ...
+   - Rescue landmark legacy software, see the [[https://www.softwareheritage.org/swhap/][SWHAP process with UNESCO]]
+* The way forward
+** An international, non profit initiative\hfill built for the long term
+   #+INCLUDE: "../../common/modules/support+sponsors.org::#support+sponsors" :only-contents t :minlevel 3   
+** Adoption is coming ...
+   #+INCLUDE: "../../common/modules/swh-adoption-academic.org::#adoption" :only-contents t :minlevel 3   
+** Breaking news, and a lesson to be learned
+*** Saving 250.000 endangered repositories...
+    - summer 2019: BitBucket announce Mercurial VCS phase out
+    - fall 2019: Software Heritage teams up with Octobus (funded by NLNet, thanks!)
+    - july 2020: BitBucket erases /250.000/ repositories
+    - august 2020: [[https://bitbucket-archive.softwareheritage.org][bitbucket-archive.softwareheritage.org]] is live
+#+BEAMER: \pause
+*** ... preserving the web of knowledge   \hfill  (Tweet [[https://twitter.com/gabrielaltay/status/1300218789762662401][is here]] ) :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=bitbucket_swh_praise.png, width=.6\linewidth, leftpic=true
+    :END:
+
+\\
+    *Bottomline*\\
+    /explicit deposit/ is important, ...\\
+    \mbox{}\hfill ... and we must promote it...\hfill\mbox{}\\
+    \mbox{}\hfill ... but will never be enough.\\
+\mbox{}\\
+\mbox{}\hfill /(think also of all software dependencies!)/
+** Conclusion
+\vspace{-.5em}
+*** Software Heritage :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .45
+    :END:
+    - /universal/ archive of source code
+    - /intrinsic/ identifiers (SWHIDS)
+    - /open/, /non profit/, long term
+    - /infrastructure/ for Open Science
+#+BEAMER: \pause
+*** You can help improve science!                                   :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .55
+    :END:
+    - /adopt/ SWH: conferences, journals, AEC 
+    - /save/ relevant source code
+    - /contribute/ to SWH: /it is open source/
+    - help build the SWH /community/
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+  #+BEGIN_EXPORT latex
+  \begin{thebibliography}{Foo Bar, 1969}
+  \footnotesize
+  \bibitem{DiCosmo2020d} Roberto Di Cosmo
+  \newblock Archiving and Referencing Source Code with Software Heritage
+  \newblock International Congress on Mathematical Software (ICMS), 2020
+  \bibitem{Abramatic2018} Jean-François Abramatic, Roberto Di Cosmo, Stefano Zacchiroli\newblock
+  \emph{Building the Universal Archive of Source Code}, CACM, October 2018
+  \href{https://doi.org/10.1145/3183558}{(10.1145/3183558)}
+  \bibitem{alliez:hal-02135891} P. Alliez, R. Di Cosmo, B. Guedj, A. Girault, M.-S. Hacid, A. Legrand and N. Rougier\newblock
+  \emph{Attributing and referencing (research) software: Best practices and outlook from Inria}, \newblock
+  CiSE 2020 \href{https://doi.ieeecomputersociety.org/10.1109/MCSE.2019.2949413}{(10.1109/MCSE.2019.2949413)}
+  \href{https://hal.archives-ouvertes.fr/hal-02135891}{(hal-02135891)}
+  \bibitem{OCamlP3l}  Roberto Di Cosmo, Marco Danelutto\newblock
+  \emph{[Rp] Reproducing and replicating the OCamlP3l experiment}. ReScience C, 6(1), 2.
+  \end{thebibliography}
+  #+END_EXPORT
+
+* Appendix :B_appendix:
+  :PROPERTIES:
+  :BEAMER_env: appendix
+  :END:
+** 
+   \vfill
+   \centerline{\Huge Appendix}
+   \vfill
+** Mirrors
+*** Thomas Jefferson, February 18, 1791 :B_block:
+    :PROPERTIES:
+    :BEAMER_ACT:
+    :BEAMER_env: block
+    :END:      
+#+latex:  {\em
+  ...let us save what remains: not by vaults and locks which fence them
+  from the public eye and use in consigning them to the waste of time,
+  but by such a multiplication of copies, as shall place them beyond
+  the reach of accident.
+#+latex: }
+   #+BEAMER: \pause
+*** Welcoming ENEA                                                  :B_block:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=LogoENEAcompletoENG.png, leftpic=true, width=.7\linewidth
+    :END:
+     - first *institutional* mirror
+     - increased resilience
+     - *AI infrastructure* for researchers
+     - stepping stone to \endgraf
+       \hfill an European joint effort
+** A revolutionary infrastructure for software source code
+  #+BEAMER: \vspace{-2mm}
+*** The /graph/ of Software Development                          :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: .5
+    :BEAMER_OPT: pic=git-merkle/merkle-vertical, leftpic=true, width=.4\linewidth
+    :END:
+    All software development with its history,
+    in *a single graph* ...
+ #+BEAMER: \pause \vspace{-2mm}
+*** Reference platform for /Big Code/                            :B_picblock:
+    :PROPERTIES:
+    :BEAMER_opt: pic=universal, leftpic=true, width=.4\linewidth
+    :BEAMER_env: picblock
+    :BEAMER_COL: .5
+    :BEAMER_act:
+    :END:
+   *One uniform data structure* enables /massive/ machine learning
+   for *quality, cybersecurity*, etc.
+
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** First datasets are available!
+   - full graph of software development (~20Bn nodes, ~200Bn edges)
+     see Pietri et al., MSR 2019 https://dx.doi.org/10.1109/MSR.2019.00030
+   - MSR 2020 mining competition
+** Automation, and storage                                        :maybemove:
+   #+BEAMER: \begin{center}
+   #+BEAMER:   \mode<beamer>{\only<1>{\includegraphics[width=\extblockscale{.9\textwidth}]{swh-dataflow-merkle-listers.pdf}}}
+   #+BEAMER:   \only<2-3>{\includegraphics[width=\extblockscale{.9\textwidth}]{swh-dataflow-merkle.pdf}}
+   #+BEAMER: \end{center}
+   #+BEAMER: \pause
+   #+BEAMER: \pause
+   - full development history *permanently archived!*
+   - over 8 billions unique source files from 140+ million origins
+** Archiving /public/ code
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.7\linewidth
+   file:codeetalab.png
+   #+latex: \end{center}
+#+BEAMER: \pause
+   https://code.etalab.gouv.fr
+** ENEA mirror
+*** Thomas Jefferson, February 18, 1791 :B_block:
+    :PROPERTIES:
+    :BEAMER_ACT:
+    :BEAMER_env: block
+    :END:      
+#+latex:  {\em
+  ...let us save what remains: not by vaults and locks which fence them
+  from the public eye and use in consigning them to the waste of time,
+  but by such a multiplication of copies, as shall place them beyond
+  the reach of accident.
+#+latex: }
+   #+BEAMER: \pause
+*** Welcoming ENEA                                                  :B_block:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=LogoENEAcompletoENG.png, leftpic=true, width=.7\linewidth
+    :END:
+     - first *institutional* mirror
+     - increased resilience
+     - *AI infrastructure* for researchers
+     - stepping stone to \endgraf
+       \hfill an European joint effort
+** The Software Heritage Acquisition Process (SWHAP)
+*** Paris Call on Software Source Code
+    “[We call to] support efforts to gather and preserve the artifacts and
+    narratives of the history of computing, while the earlier creators are still
+    alive”
+#+BEAMER: \pause
+*** SWHAP : an important step forward
+     - detailed guidelines to *curate* landmark legacy source code
+       and *archive* it on Software Heritage
+     - intense cooperation with *Università di Pisa* and *UNESCO*
+     - open to all, we'll promote it worldwide
+*** 
+    https://www.softwareheritage.org/swhap
+* A bit of tech info
+** A peek under the hood                                          :maybemove:
+    #+BEAMER: \begin{center}
+    #+BEAMER:   \mode<beamer>{\only<1>{\includegraphics[width=\extblockscale{1\textwidth}]{swh-dataflow-merkle-listers.pdf}}}
+    #+BEAMER:   \only<2-3>{\includegraphics[width=\extblockscale{1\textwidth}]{swh-dataflow-merkle.pdf}}
+    #+BEAMER: \end{center}
+#+BEAMER: \pause
+#+BEAMER: \pause
+   /Global development history/ permanently archived in a /unique/ git-like Merkle DAG
+   - *~400 TB* (uncompressed) blobs, *~20 B* nodes, *~280 B* edges
+   #   - *GitHub*, Gitlab.com, Bitbucket, /Gitorious/, /GoogleCode/, GNU, PyPi, Debian, NPM...
+* The SWH-ID: the source code fingerprint                          :noexport:
+** Software Heritage Identifiers (SWHID) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][link to full docs]]
+# #+INCLUDE: "../../common/modules/swh-id-syntax.org::#swh-id-syntax" :only-contents t :minlevel 3
+  #+LATEX: \centering%\forcebeamerstart
+  #+LATEX: \mode<beamer>{\only<1>{\includegraphics[width=\linewidth]{SWHID-v1.4_1.png}}}
+  #+LATEX: \mode<beamer>{\only<2>{\includegraphics[width=\linewidth]{SWHID-v1.4_2.png}}}
+  #+LATEX: \only<3->{\includegraphics[width=\linewidth]{SWHID-v1.4_3.png}}
+  #+LATEX: %\forcebeamerend
+*** An emerging standard :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <4->
+    :BEAMER_COL: .6
+    :BEAMER_env: block
+    :END:
+    - in Linux Foundation's [[https://spdx.github.io/spdx-spec/appendix-VI-external-repository-identifiers/#persistent-id][SPDX 2.2]]
+    - IANA registered, WikiData property [[https://www.wikidata.org/wiki/Property:P6138][P6138]]
+*** Examples: :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <5->
+    :BEAMER_COL: .4
+    :BEAMER_env: block
+    :END:
+    - [[https://archive.softwareheritage.org/swh:1:cnt:64582b78792cd6c2d67d35da5a11bb80886a6409;origin=https://github.com/virtualagc/virtualagc;lines=245-261/][Apollo 11 AGC excerpt]],
+    - [[https://archive.softwareheritage.org/swh:1:cnt:bb0faf6919fc60636b2696f32ec9b3c2adb247fe;origin=https://github.com/id-Software/Quake-III-Arena;lines=549-572/][Quake III rsqrt]]
+** A worked example
+  #+LATEX: \centering\forcebeamerstart
+  #+LATEX: \only<1>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_1.pdf}}}
+  #+LATEX: \only<2>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/contents.pdf}}}
+  #+LATEX: \only<3>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_2_contents.pdf}}}
+  #+LATEX: \only<4>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/directories.pdf}}}
+  #+LATEX: \only<5>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_3_directories.pdf}}}
+  #+LATEX: \only<6>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/revisions.pdf}}}
+  #+LATEX: \only<7>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_4_revisions.pdf}}}
+  #+LATEX: \only<8>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/releases.pdf}}}
+  #+LATEX: \only<9>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_5_releases.pdf}}}
+  #+LATEX: \only<10>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/snapshots.pdf}}}
+  #+LATEX: \forcebeamerend
+* The way forward
+** Come in, we're open!
+#+BEGIN_EXPORT latex
+% \begin{center}
+% \includegraphics[width=.5\linewidth]{SWH-logo.pdf}
+% \end{center}
+% \begin{center}
+% {\large \url{www.softwareheritage.org} \hspace{4em} \url{@swheritage}}
+% \end{center}
+#+END_EXPORT
+*** Library of Alexandria of code                       :B_picblock:noexport:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: 0.4
+    :BEAMER_OPT: pic=clock-spring-forward.png,width=.45\linewidth,leftpic=true
+    :END:
+    Working together to
+    - recover the past
+    - preserve our heritage
+    - share the knowledge
+    - prepare the future
+*** Library of Alexandria of code                          :B_block:noexport:
+    :PROPERTIES:
+    :BEAMER_COL: 0.42
+    :BEAMER_env: block
+    :END:
+    \begin{center}\includegraphics[width=.4\linewidth]{clock-spring-forward.png}\end{center}
+    - recover the past
+    - structure the future
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+  #+BEGIN_EXPORT latex
+  \vfill
+  \begin{center}\Large Questions?\end{center}
+  \vfill
+  #+END_EXPORT
+*** Learn more \hfill www.softwareheritage.org/publications         :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :END:
+  #+BEGIN_EXPORT latex
+  \begin{thebibliography}{Foo Bar, 1969}
+  \footnotesize
+
+  \bibitem{ARSCSWH} Roberto Di Cosmo. \emph{Archiving and referencing source code with Software Heritage}\newblock
+  ICMS 2020, preprint: hal-02526083
+
+  \bibitem{Abramatic2018} Jean-François Abramatic, Roberto Di Cosmo, Stefano Zacchiroli\newblock
+  \emph{Building the Universal Archive of Source Code}, Communications of the ACM, October 2018
+
+  \bibitem{DiCosmo2020} P. Alliez, R. Di Cosmo, B. Guedj, A. Girault, M. Hacid, A. Legrand, N. Rougier\newblock
+  \emph{Attributing and Referencing (Research) Software: Best Practices and Outlook From Inria},
+  Computing in Science \& Engineering, 22 (1), pp. 39-52, 2020, ISSN: 1558-366X
+
+  \bibitem{DiCosmo2020} Roberto Di Cosmo, Morane Gruenpeter, Stefano Zacchiroli\newblock
+  \emph{Referencing Source Code Artifacts: a Separate Concern in Software Citation},
+  Computing in Science \& Engineering, 2020, ISSN: 1521-9615
+
+  \bibitem{OCamlP3l}  Roberto Di Cosmo, Marco Danelutto\newblock
+  \emph{[Rp] Reproducing and replicating the OCamlP3l experiment}. ReScience C, 6(1), 2.
+
+  \end{thebibliography}
+  #+END_EXPORT
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** Come in, we're open                                            :noexport:
+    \hfill  https://sponsorship.softwarheritage.org