A. Gritzalis, A. Tsohou, and C. Lambrinoudakis. e-Democracy, volume 792 of Communications in Computer and Information Science, page 47-63. Springer, (2017)
A. Tsohou, S. Kokolakis, C. Lambrinoudakis, and S. Gritzalis. e-Democracy, volume 26 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, page 220-235. Springer, (2009)