Contributing to a digital single market for Europe: barriers and drivers of an EU-wide once-only principleKalvet, Tarmo; Toots, Maarja; Krimmer, Robert Johannesdg.o 18 : Proceedings of the 19th Annual International Conference on Digital Government Research : Governance in the Data Age : Delft, Netherlands, May 30-June 01, 20182018 / Article No. 45, 8 p https://doi.org/10.1145/3209281.3209344 Conference proceedings at Scopus Article at Scopus Article at WOS

Cross-border e-government services in Europe: expected benefits, barriers and drivers of the once-only principleKalvet, Tarmo; Toots, Maarja; Veenstra, Anne Fleur van; Krimmer, Robert JohannesICEGOV2018 : proceedings of the 11th International Conference on Theory and Practice of Electronic Governance : 4 - 6 April 2018, Galway, Ireland2018 / p. 59-68 https://doi.org/10.1145/3209415.3209458 Conference proceedings at Scopus Article at Scopus Article at WOS

ICT-driven co-creation in the public sector : drivers, barriers and success strategies [Online resource]Toots, MaarjaElectronic Government and Electronic Participation : joint proceedings of ongoing research, PhD papers, posters and workshops of IFIP EGOV and ePart 20162016 / p. 368-375 http://dx.doi.org/10.3233/978-1-61499-670-5-368

Identifying factors that influence the transition towards a smarter sustainable city : preliminary findings of the case study of Porto Alegre, BrazilSchuch de Azambuja, LuizaOngoing Research, Practitioners, Posters, Workshops, and Projects of the International Conference EGOV-CeDEM-ePart 20222022 / code 193901 https://ceur-ws.org/Vol-3399/paper28.pdf Conference Proceeding at Scopus Article at Scopus

Live enrollment for identity documents in Europe : the cases of Sweden, Norway, Kosovo, and EstoniaKalvet, Tarmo; Karlzen, Henrik; Hunstad, Amund; Tiits, MarekeJournal of eDemocracy and open government = JeDEM2018 / p. 53-73 : ill https://doi.org/10.29379/jedem.v10i2.517

Live enrolment for identity documents in EuropeKalvet, Tarmo; Karlzén, Henrik; Hunstad, Amund; Tiits, MarekElectronic Government : 17th IFIP WG 8.5 International Conference : EGOV 2018, Krems, Austria, September 3–5, 2018 : proceedings2018 / p. 29-39 : ill https://doi.org/10.1007/978-3-319-98690-6_3 Conference Proceedings at Scopus Article at Scopus Conference Proceedings at WOS Article at WOS

Open data as enabler of public service co-creation : exploring the drivers and barriersToots, Maarja; McBride, Keegan David Braun; Kalvet, Tarmo; Krimmer, Robert JohannesProceedings of the 7th International Conference for E-Democracy and Open Government CeDEM17 : Danube University Krems, Krems, Austria, 17-19 May 20172017 / p. 102-112 : tab https://doi.org/10.1109/CeDEM.2017.12

To i-vote or not to i-vote: drivers and barriers to the implementation of internet votingLicht, Nathan; Duenas-Cid, David; Krivonosova, Iuliia; Krimmer, Robert JohannesElectronic voting : 6th International Joint Conference, E-Vote-ID 2021, Virtual Event, October 5–8, 2021, Proceedings2021 / p. 91-105 : ill https://doi.org/10.1007/978-3-030-86942-7_7 Conference proceeding at Scopus Article at Scopus Conference proceeding at WOS Article at WOS