M. Schubert, A. Felfernig, and M. Mandl. Proceedings of the 2009 International Conference on Adaptive and Intelligent Systems, page 9-14. Klagenfurt, Austria, (2009)
Z. Yu, Z. Yu, X. Zhou, and Y. Nakamura. IUI '09: Proceedings of the 13th International Conference on Intelligent User Interfaces, page 407--412. New York, NY, USA, ACM, (2009)
Y. Hijikata, T. Shimizu, and S. Nishida. IUI '09: Proceedingsc of the 13th international conference on Intelligent user interfaces, page 67--76. New York, NY, USA, ACM, (2008)
J. Tang, H. fung Leung, Q. Luo, D. Chen, and J. Gong. Proceedings of the Twenty-First International Joint Conference on Artificial Intelligence, page 2089-2094. Pasadena, California, USA, (2009)