X. Xu, N. Yuruk, Z. Feng, and T. Schweiger. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, page 824--833. New York, NY, USA, ACM, (2007)
C. Ding, X. He, and H. Zha. KDD '01: Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, page 275--280. New York, NY, USA, ACM, (2001)
H. Ino, M. Kudo, and A. Nakamura. WWW '05: Proceedings of the 14th international conference on World Wide Web, page 661--669. New York, NY, USA, ACM, (2005)
C. Tantipathananandh, T. Berger-Wolf, and D. Kempe. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, page 717--726. New York, NY, USA, ACM, (2007)