BADEA GHEORGHE (2012). A PLATFORM SUITABLE FOR IMPLEMENTING AN E-LEARNING SYSTEM - CORE CONDITIONS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference, 1035 - 1042 pp. https://doi.org/10.5593/sgem2012/s23.v3001