Claus Eikemeier Ulrike Lechner Peer-to-Peer and Group Collaboration - Do They Always Match? 101-106 2004 conf/wetice/2004 WETICE http://doi.ieeecomputersociety.org/10.1109/ENABL.2004.49 db/conf/wetice/wetice2004.html#EikemeierL04