Electronic government 18th IFIP WG 8.5 International Conference, EGOV 2019, San Benedetto Del Tronto, Italy, September 2–4, 2019, proceedings - Lindgren, Ida; Janssen, Marijn 1972-; Lee, Habin; Polini, Andrea; Rodríguez Bolívar, Manuel Pedro; Scholl, Hans Jochen; Tambouris, Efthimios (Lecture notes in computer science, 2019)