K. Kornél, A. Kocsor, and {. Szepesvári. HACIPPR-2005 (Joint Hungarian-Austrian Conference on Image Processing and Pattern Recognition), page 1-- 2. (2005)
G. Webb, G. Cumming, T. Richards, and K. Yum. Proceedings of the Seventh Annual Conference of the Australian Society for Computers in Learning in Tertiary Education (ASCILITE '89), page 408-420. Gold Coast, Bond University, (1989)