@MASTERSTHESIS{Trapp2003diplom, author = {Alexander Trapp}, title = {Anwendung von e-learning-Standards in CSCL-Systemen}, school = {Universität Hamburg, Fachbereich Informatik}, year = {2003}, type = {Diplomarbeit}, address = {Vogt-Kölln-Str. 30, 22527 Hamburg, Germany}, month = {6} }