- Springer, New York, (2011)
- Communications of the ACM 54(2):60-71 (February 2011)
- Artificial Intelligence Review 35(4):319-338 (April 2011)
- Multimedia Tools and Applications 54(1):97-120 (April 2011)
- IUI '11: Proceedings of the 15th International Conference on Intelligent User Interfaces, Palo Alto, CA, USA, page 327-330. (2011)
- IUI '07: Proceedings of the 11th International Conference on Intelligent User Interfaces, Honolulu, Hawaii, USA, page 206-215. (2007)
- IUI '06: Proceedings of the 10th International Conference on Intelligent User Interfaces, Sydney, Australia, page 132-139. (2006)
- IUI '08: Proceedings of the 12th International Conference on Intelligent User Interfaces, Gran Canaria, Spain, page 20-29. (2008)
- Communications of the ACM 54(1):132-138 (January 2011)
- Communications of the ACM 54(1):20–22 (January 2011)
- Communications of the ACM 53(12):13–15 (December 2010)
- Ambient Assisted Living: 4.\ AAL-Kongress 2011 Berlin, Germany, (2011)
- New York, ACM, (2011)
- Computers in the Human Interaction Loop, chapter 23, (2009)
- Ambient Intelligence: First International Joint Conference, AmI 2010, Málaga, Spain, (2010)
- Handbook of Ambient Intelligence and Smart Environments, (2010)
- it -- Information Technology 50(1):45-50 (2008)
- The Internet of Things: First International Conference, IOT 2008, Zurich, Switzerland, (2008)
- Semantic Web 1(1-2):83-88 (2010)
- Journal on Multimodal User Interfaces 4(1):3-10 (2010)


user