Electronic government 20th IFIP WG 8.5 International Conference, EGOV 2021, Granada, Spain, September 7-9, 2021 : proceedings - Scholl, Hans J.; Gil García, José Ramón; Janssen, Marijn 1972-; Kalampokis, Evangelos; Lindgren, Ida; Rodríguez Bolívar, Manuel Pedro (Springer, 2021)