Regularities in the Formation and Evolution of Information Cities. - Stelios Lelis; Petros Kavassalis; Jakka Sairamesh; Seif Haridi; Fredrik Holmgren; Mahmoud Rafea; Antonis Hatzistamatiou (Digital Cities, 2001)

Mobile Permission Marketing: Framing the Market Inquiry. - Petros Kavassalis; Ntina Spyropoulou; Dimitris Drossos; Evangelos Mitrokostas; Gregory Gikas; Antonis Hatzistamatiou (Int. J. Electron. Commer., 2003)