T. Joachims. Proceedings of ICML-99, 16th International Conference on Machine Learning, стр. 200--209. Bled, SL, Morgan Kaufmann Publishers, San Francisco, US, (1999)
S. Kaasten, и S. Greenberg. CHI '01: CHI '01 extended abstracts on Human factors in computing systems, стр. 379--380. New York, NY, USA, ACM Press, (2001)
I. Kim. Intelligent Agents: Specification, Modeling, and Applications. 4th Pacific Rim International Workshop on Multi-Agents, PRIMA 2001. Proceedings (Lecture Notes in Artificial Intelligence Vol.2132), стр. 210--21. Dept. of Comput. Sci., Kyonggi Univ., Suwon, South Korea, Springer-Verlag, (2001)