Z. Cheng, J. Caverlee, and K. Lee. Proceedings of the 19th ACM International Conference on Information and Knowledge Management, page 759--768. New York, NY, USA, ACM, (2010)
Y. Oh, D. Lee, S. Kang, and J. Lee. 5th IEEE/ACM International Conference on Formal Methods and Models for Codesign, 2007. MEMOCODE 2007, page 87--88. IEEE, (June 2007)
O. Kurland, and L. Lee. Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, page 306-313. (2005)
R. Lee, P. Jonathan, and P. Ziman. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science, 466 (2121):
2545--2560(Sep 8, 2010)