Social informatics 11th international conference, SocInfo 2019, Doha, Qatar, November 18–21, 2019, proceedings - Weber, Ingmar 1978-; Darwish, Kareem M.; Wagner, Claudia; Zagheni, Emilio; Nelson, Laura; Aref, Samin; Flöck, Fabian (Lecture notes in computer science, 2019)