R. Jäschke, A. Hotho, C. Schmitz, B. Ganter, and G. Stumme. Proceedings of the 6th IEEE International Conference on Data Mining (ICDM 06), page 907-911. Hong Kong, IEEE Computer Society, (December 2006)
R. Jäschke, and S. Rudolph. Contributions to the 11th International Conference on Formal Concept Analysis, page 19--34. Technische Universität Dresden, (May 2013)
W. Kollewe, M. Skorsky, F. Vogt, and R. Wille. Begriffliche Wissensverarbeitung-Grundfragen und Aufgaben, page 267-288. Mannheim, B. I. -Wissenschaftsverlag, (1994)
S. Krolak-Schwerdt, P. Orlik, and B. Ganter. Studies in Classification, Data Analysis, and Knowledge Organization, volume 4 of Information systems and data analysis, Springer, Berlin, (1994)