- Wiley, Chichester, UK, (2011)
- Wiley, Chichester, UK, (2010)
- IEEE Intelligent Systems 24(6):83-89 (2009)
- IEEE Pervasive Computing 10(2):16-18 (2011)
- Computer 44(9):73-79 (2011)
- Lecture Notes in Computer Science Springer, Berlin, (2011)
- Communications of the ACM 54(2):60-71 (February 2011)
- Communications of the ACM (June 2011)
- Communications of the ACM (August 2011)
- Personal and Ubiquitous Computing 15(3):271-289 (March 2011)
- Artificial Intelligence Review 36(1):1-27 (June 2011)
- Journal of Computer Science and Technology (March 2011)
- Applied Intelligence 35(2):242-259 (October 2011)
- Multimedia Tools and Applications 55(3):443-481 (December 2011)
- Morgan Kaufmann, Amsterdam, 3. edition, (2011)
- Wiley, Chichester, UK, (2010)
- 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):86–95 (January 2011)
- Ambient Assisted Living: 4.\ AAL-Kongress 2011 Berlin, Germany, (2011)
- Multimedia Tools and Applications 51(1):35-76 (January 2011)


user