Martin Kraft (https://commons.wikimedia.org/wiki/File:MJK_26491_Wikimania_2018_group_photo.jpg), „MJK 26491 Wikimania 2018 group photo“, https://creativecommons.org/licenses/by-sa/3.0/legalcode
Martin Kraft (https://commons.wikimedia.org/wiki/File:MJK_26491_Wikimania_2018_group_photo.jpg), „MJK 26491 Wikimania 2018 group photo“, https://creativecommons.org/licenses/by-sa/3.0/legalcode