Y. Chung, M. Toyoda, and M. Kitsuregawa. Proceedings of the 5th International Workshop on Adversarial Information Retrieval on the Web, page 9--16. New York, NY, USA, ACM, (2009)
J. Mackinlay, R. Rao, and S. Card. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, page 67--73. New York, NY, USA, ACM Press/Addison-Wesley Publishing Co., (1995)
R. Nallapati, A. Ahmed, E. Xing, and W. Cohen. Proceedings of the 14th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 542--550. New York, NY, USA, ACM, (2008)