Merge pull request #12 from diggr/thoffma-patch-1

Update publications.md

Author: olf42

publications.md

@@ -50,7 +50,11 @@ Mühleder, Peter, Hoffmann, Tracy, & Rämisch, Florian. (2019). Video Game Platf
 
 ## 2019
 
-Konstantin Freybe, Florian Rämisch and Tracy Hoffmann. With small steps to the big picture - A method and tool negotiation workflow. Twin Talks: Understanding Collaboration in DH at DHN 2019  
+Jean-Frédéric Berthelot, Tracy Hoffmann and Envel Le Hir. Sum of All video games − 2019 edition. WikidataCon 2019, Berlin, 26. December 2019.
+[Video](https://commons.wikimedia.org/wiki/File:WikidataCon_2019_-_Sum_of_all_video_games.pdf) and
+[Presentation](https://media.ccc.de/v/wikidatacon2019-1074-sum_of_all_video_games_2019_edition)
+
+Konstantin Freybe, Florian Rämisch and Tracy Hoffmann. With small steps to the big picture - A method and tool negotiation workflow. Twin Talks: Understanding Collaboration in DH at DHN 2019.
 [http://www.clarin.eu/sites/default/files/DHN\_2019\_diggr.pdf](http://www.clarin.eu/sites/default/files/DHN_2019_diggr.pdf)
 
 Lahmann, André und Martin Roth. „Die jGames-Sammlung an der UB Leipzig: Wie man 4.500 japanische Videospiele nutzbar macht“. gehalten auf der BID Kongress 2019, Leipzig, 19. März 2019.