- Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems IROS, Taipei, page 4057-4062. (October 2010)
- IMCI-MLMI 2010: Proceedings of the 12th International Conference on Multimodal Interfaces and the 7th Workshop on Machine Learning for Multimodal Interfaces, Beijing, China, page 19:1--19:8. (2010)
- CSLI Lecture Notes Center for the Study of Language and Information, Stanford, CA, (1994)
- Dissertationen zur Künstlichen Intelligenz DISKI infix, Sankt Augustin, (1996)
- Oldenbourg, München, 4. edition, (2003)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (2009)
- Lecture Notes in Computer Science Springer, Berlin, (2009)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (1998)
- Social Robotics 1(2):127-140 (2009)
- KI 2007: Advances in Artificial Intelligence, (2007)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (1999)
- Handbook of Ambient Intelligence and Smart Environments, (2010)
- volume 5949 of Lecture Notes in Computer Science, Berlin, Springer, (2010)
- Automatica 42(12):2035-2057 (2006)
- Springer, Berlin, (2008)


user