E-governance and stage models : analysis of identified models and selected Eurasian experiences in digitising citizen service deliveryMeyerhoff Nielsen, MortenElectronic government, an international journal2016 / p. 107-141 : ill http://dx.doi.org/10.1504/EG.2016.076132 Innovation : a factor explaining e-government success in EstoniaKalvet, TarmoElectronic government, an international journal2012 / p. 142-157 http://dx.doi.org/10.1504/EG.2012.046266