B. Stvilia, M. Twidale, L. Gasser, and L. Smith. Knowledge Management: Nurturing Culture, Innovation, and Technology - Proceedings of the 2005 International Conference on Knowledge Management, (2005)
T. Prante, K. Petrovic, and R. Stenzel. page 291-302. Paderborn, Germany, Oldenbourg, München, (2004)Mensch & Computer 2004 - Allgegenwärtige Interaktion.