Electronic participation 13th IFIP WG 8.5 International Conference, ePart 2021, Granada, Spain, September 7-9, 2021 : proceedings - Edelmann, Noella 1973-; Csáki, Csaba 1940-; Hofmann, Sara 1986-; Lampoltshammer, Thomas; Alcaide-Muñoz, Laura 1980-; Parycek, Peter; Schwabe, Gerhard 1962-; Tambouris, Efthimios (Information systems and applications, incl. internet/web, and HCI, 2021)