Andreas Konstantinidis Thrasyvoulos Tsiatsos Selecting a Networked Virtual Environment Platform and the Design of a Collaborative e-Learning Environment. 44-49 2008 AINA Workshops http://doi.ieeecomputersociety.org/10.1109/WAINA.2008.59 conf/aina/2008w db/conf/aina/ainaw2008.html#AndreasT08