U. Fayyad, G. Piatetsky-Shapiro, and P. Smyth. Proceedings of the 2nd international conference on Knowledge Discovery and Data mining (KDD'96), page 82--88. AAAI Press, (August 1996)
F. Baader, B. Ganter, B.Sertkaya, and U. Sattler. Proceedings of the Twentieth International Joint Conference on Artificial Intelligence (IJCAI'07), page 230--235. (2007)
J. Hereth, G. Stumme, R. Wille, and U. Wille. Conceptual Structures: Logical, Linguistic, and Computational Issues. Proc. ICCS '00, volume 1867 of LNAI, page 421-437. Heidelberg, Springer, (2000)
J. Hereth, G. Stumme, R. Wille, and U. Wille. Conceptual Structures: Logical, Linguistic, and Computational Issues. Proc. ICCS '00, volume 1867 of LNAI, page 421-437. Heidelberg, Springer, (2000)Part of hereth03conceptual.
U. Thiel, and R. Hammwohner. 10th annual international ACM SIGIR conference on Research and development in information retrieval, New Orleans, Louisiana, United States, ACM, (1987)