Bogdan-Florin Marin Axel Hunger Stefan Werner Sorin Meila Christian Schuetz An intelligent tutor-agent to support collaborative learning within a virtual environment. 5509-5514 2004 conf/smc/2004 SMC (6) http://dx.doi.org/10.1109/ICSMC.2004.1401070 db/conf/smc/smc2004-6.html#MarinHWMS04