Lambrinoudakis, Costas, Stefanos Gritzalis, Fredj Dridi, and Günther Pernul. "Security Requirements for E-Government Services: A Methodological Approach for Developing a Common PKI-based Security Policy." Computer Communications 26, no. 16 (2003): 1873-1883.

Ikonomopoulos, Spyros, Dimitris Gritzalis, Spyros Kokolakis, Kostas Vassiliou, and Costas Lambrinoudakis. Functional Requirements for a Secure Electronic Voting System In IFIP TC11 17th International Conference on Information Security . Cairo, 2002.

Gritzalis, Stefanos, and Costas Lambrinoudakis. Security Requirements of e-Government Services: An Organizational Framework In International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA?2002). Las Vegas, Nevada, USA, 2002.