J. Hereth, G. Stumme, R. Wille, и U. Wille. Conceptual Structures: Logical, Linguistic, and Computational Issues. Proc. ICCS '00, том 1867 из LNAI, стр. 421-437. Heidelberg, Springer, (2000)
U. Fayyad, G. Piatetsky-Shapiro, и P. Smyth. Advances in knowledge discovery and data mining, American Association for Artificial Intelligence, Menlo Park, CA, USA, (1996)
R. Agrawal, и R. Srikant. VLDB '94: Proceedings of the 20th International Conference on Very Large Data Bases, стр. 487--499. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (1994)
