Designing proactive business event services : a case study of the Estonian company registration portalKõrge, Helena; Erlenheim, Regina; Draheim, DirkElectronic Participation : 11th IFIP WG 8.5 International Conference, ePart 2019, San Benedetto Del Tronto, Italy, September 2–4, 2019, Proceedings2019 / p. 73 - 84 https://doi.org/10.1007/978-3-030-27397-2_7 Conference proceeding at Scopus Article at Scopus Conference proceeding at WOS Article at WOS