G. Stumme, R. Wille, and U. Wille. Principles of Data Mining and Knowledge Discovery, volume 1510 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (1998)
J. Poelmans, P. Elzinga, S. Viaene, and G. Dedene. Conceptual Structures: From Information to Intelligence, volume 6208 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2010)