An overview of digital signing and the influencing factors in Estonian local governmentsFelt, Sigrid; Pappel, Ingmar; Pappel, IngridFuture Data and Security Engineering : Third International Conference, FDSE 2016, Can Tho City, Vietnam, November 23-25, 2016 : proceedings2016 / p. 371-384 : ill http://dx.doi.org/10.1007/978-3-319-48057-2_26 Systematic digital signing in Estonian e-Government processes : influencing factors, technologies, change managementPappel, Ingrid; Pappel, Ingmar; Tepandi, Jaak; Draheim, DirkTransactions on large-scale data- and knowledge-centered systems XXXVI : special issue on data and security engineering2017 / p. 31-51 : ill https://doi.org/10.1007/978-3-662-56266-6_2