T. Zhang, R. Ramakrishnan, and M. Livny. Proceedings of the 1996 ACM SIGMOD International Conference on Management of Data, page 103--114. New York, NY, USA, ACM, (1996)
C. Siefkes, F. Assis, S. Chhabra, and W. Yerazunis. PKDD '04: Proceedings of the 8th European Conference on Principles and Practice of Knowledge Discovery in Databases, page 410--421. New York, NY, USA, Springer-Verlag New York, Inc., (2004)
G. Stumme, R. Taouil, Y. Bastide, and L. Lakhal. Proc. GI-Fachgruppentreffen Maschinelles Lernen (FGML'01), Universität Dortmund 763, (October 2001)Part of stumme02computing.