- Springer, London, (2011)
- Proceedings of the 16th international conference on Intelligent user interfaces, page 461. (2011)
- Springer, New York, (2011)
- Springer, New York, (2011)
- Springer, London, (2011)
- Computer 44(5):38-45 (2011)
- Computer 44(5):46-52 (2011)
- Communications of the ACM 54(2):60-71 (February 2011)
- Informatik-Spektrum 34(2):120-133 (April 2011)
- Springer, Berlin, (2011)
- Artificial Intelligence Review 35(4):319-338 (April 2011)
- Informatik-Spektrum 34(4):400-404 (August 2011)
- Personal and Ubiquitous Computing 15(4):353-363 (April 2011)
- Informatik-Spektrum 34(2):143-152 (April 2011)
- Personal and Ubiquitous Computing 15(4):409-418 (April 2011)
- Personal and Ubiquitous Computing 15(3):221-233 (March 2011)
- Personal and Ubiquitous Computing 15(4):399-408 (April 2011)
- Personal and Ubiquitous Computing 15(4):315-316 (April 2011)
- Journal of Intelligent Information Systems 36(2):131-166 (April 2011)
- Journal of Intelligent Information Systems 36(2):167-195 (April 2011)


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