Meletis Margaritis Nikolaos M. Avouris Georgios Kahrimanis On Supporting Users' Reflection During Small Groups Synchronous Collaboration. 140-154 2006 conf/criwg/2006 CRIWG http://dx.doi.org/10.1007/11853862_12 db/conf/criwg/criwg2006.html#MargaritisAK06