On the Systematic Exploitation of the Estonian Data Exchange Layer X-Road for Strengthening Public-Private Partnerships. - Karoline Paide; Ingrid Pappel; Heiko Vainsalu; Dirk Draheim (ICEGOV, 2018)

The Impact of the Single Digital Gateway Regulation from the Citizens' Perspective. - Rakshya Bhattarai; Ingrid Pappel; Heiko Vainsalu; Sadok Ben Yahia; Dirk Draheim (CENTERIS/ProjMAN/HCist, 2019)