W. Jin, A. Tung, и J. Han. KDD '01: Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, стр. 293--298. New York, NY, USA, ACM, (2001)
E. Knorr, и R. Ng. VLDB '98: Proceedings of the 24rd International Conference on Very Large Data Bases, стр. 392--403. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (1998)