The behaviour of parsing time under grammar morphisms. - J. Keklikoglou; Hermann K.-G. Walter; Walter Kern (RAIRO Theor. Informatics Appl., 1978)

Data security in medical information systems: The Greek case. - Dimitris Gritzalis; A. Tomaras; Sokratis K. Katsikas; J. Keklikoglou (Comput. Secur., 1991)

Determining access rights for medical information systems. - Dimitris Gritzalis; Sokratis K. Katsikas; J. Keklikoglou; A. Tomaras (Comput. Secur., 1992)