• Analyzing eID public acceptance and user preferences for current authentication options in EstoniaTsap, Valentyna; Lips, Silvia; Draheim, DirkElectronic Government and the Information Systems Perspective : 9th International Conference, EGOVIS 2020, Bratislava, Slovakia, September 14-17, 2020 : proceedings2020 / p. 159-173 https://doi.org/10.1007/978-3-030-58957-8_12
• eID public acceptance in Estonia : towards understanding the citizenTsap, Valentyna; Lips, Silvia; Draheim, DirkThe Proceedings of the 21st Annual International Conference on Digital Government Research (DGO2020), Intelligent Government in the Intelligent Information Society : June 15-19, 2020, Seoul, Republic of Korea2020 / p. 340−341 https://doi.org/10.1145/3396956.3397009
• eSignature in eCourt SystemsAhmed, Rozha Kamal; Lips, Silvia; Draheim, DirkProceedings of the World Conference on Smart Trends in Systems, Security and Sustainability (WS4 2020), London, UK, July 27 – 28, 2020 : Virtual Conference2020 / p. 352-356 https://doi.org/10.1109/WorldS450073.2020.9210309
• Factors affecting e-ID public acceptance : a literature reviewTsap, Valentyna; Pappel, Ingrid; Draheim, DirkElectronic Government and the Information Systems Perspective : 8th International Conference, EGOVIS 2019 : Linz, Austria, August 26–29, 2019 : proceedings2019 / p. 176-188 : tab http://doi.org/10.1007/978-3-030-27523-5_13
• The future of the once-only principle in EuropeKrimmer, Robert Johannes; Prentza, Andriana; Mamrot, Szymon; Schmidt, Carsten; Cepilovs, AleksandrsThe once-only principle : The TOOP project2021 / p. 225–236 https://doi.org/10.1007/978-3-030-79851-2_12