Y. Zheng, F. Liu, and H. Hsieh. International Conference on Knowledge Discovery and Data Mining (SIGKDD), page 1436--1444. New York, NY, USA, ACM, (2013)
B. Yu, and M. Singh. Cooperative Information Agents IV - The Future of Information Agents in Cyberspace, volume 1860 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2000)
J. Leite, Y. Yu, L. Liu, E. Yu, and J. Mylopoulos. International Conference on Advanced Information Systems Engineering, page 535-550. Porto, Portugal, (13--17 06 2005)