S. Bloehdorn, and A. Hotho. Proceedings of the MSW 2004 workshop at the 10th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, page 70-87. (August 2004)
S. Bloehdorn, P. Cimiano, A. Hotho, and S. Staab. LDV Forum - GLDV Journal for Computational Linguistics and Language Technology, 20 (1):
87-112(May 2005)
G. Wu, E. Chang, and N. Panda. KDD '05: Proceeding of the eleventh ACM SIGKDD international conference on Knowledge discovery in data mining, page 703--709. New York, NY, USA, ACM Press, (2005)
R. Agrawal, and R. Srikant. VLDB '94: Proceedings of the 20th International Conference on Very Large Data Bases, page 487--499. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (1994)