T. Ley, S. Lindstaedt, and D. Albert. Professional Knowledge Management, volume 3782 of Lecture Notes in Computer Science, Springer, Heidelberg, (2005)
T. Ley, B. Kump, A. Ulbrich, P. Scheir, and S. Lindstaedt. Proceedings of Ed Media 2008 World Conference on Educational Multimedia, Hypermedia & Telecommunications, Vienna, Austria, June 30-July 4, AACE, Chesapeake, VA, (2008)