E. Schwarzkopf, M. Bauer, und D. Dengler. Proceedings of the 7th international conference on Intelligent user interfaces, Seite 220--221. New York, NY, USA, ACM, (2002)
E. Schwarzkopf, M. Bauer, und D. Dengler. Proceedings of the 8th international conference on Intelligent user interfaces, Seite 287--289. New York, NY, USA, ACM, (2003)
M. Strohmaier, P. Prettenhofer, und M. Lux. CSKGOI'08 International Workshop on Commonsense Knowledge and Goal Oriented Interfaces, in conjunction with IUI'08, Canary Islands, Spain, (2008)