A. Girouard, E. Solovey, R. Mandryk, D. Tan, L. Nacke, and R. Jacob. CHI EA '10: Proceedings of the 28th of the international conference extended abstracts on Human factors in computing systems, page 4433--4436. New York, NY, USA, ACM, (2010)
F. Shipman, H. Hsieh, P. Maloor, and M. Moore. HYPERTEXT '01: Proceedings of the twelfth ACM conference on Hypertext and Hypermedia, page 113--122. New York, NY, USA, ACM Press, (2001)
S. Dumais, E. Cutrell, J. Cadiz, G. Jancke, R. Sarin, and D. Robbins. SIGIR '03: Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval, page 72--79. ACM Press, (2003)
A. Rivadeneira, D. Gruen, M. Muller, and D. Millen. CHI '07: Proceedings of the SIGCHI conference on Human factors in computing systems, page 995--998. New York, NY, USA, ACM, (2007)
C. Goldman, A. Langer, and J. Rosenschein. Proceedings of the First International Conference on Practical Applications of Intelligent Agents and Multi-Agents Technology (PAAM96), (1996)