Disinformation in open online media Third Multidisciplinary International Symposium, MISDOOM 2021, virtual event, September 21-22, 2021 : proceedings - Bright, Jonathan; Giachanou, Anastasia 1986-; Spaiser, Viktoria 1981-; Spezzano, Francesca; George, Anna; Pavliuc, Alexandra (Information systems and applications, incl. internet/web, and HCI, 2021)