R. Fagin, R. Kumar, и D. Sivakumar. Proceedings of the fourteenth annual ACM-SIAM symposium on Discrete algorithms, стр. 28--36. Philadelphia, PA, USA, Society for Industrial and Applied Mathematics, (2003)
T. Hofmann. Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval, стр. 50--57. New York, NY, USA, ACM, (1999)
V. Raykar, R. Duraiswami, и B. Krishnapuram. Proceedings of the Eleventh International Conference on Artificial Intelligence and Statistics, стр. 385--392. (2007)