R. Jäschke, A. Hotho, C. Schmitz, and G. Stumme. Proceedings of the 15th International Conference on Conceptual Structures, volume 4604 of LNCS, Sheffield, England, (July 2007)
P. Cimiano, A. Hotho, G. Stumme, and J. Tane. Proceedings of the The Second International Conference on Formal Concept Analysis (ICFCA 04), volume 2961 of LNCS, Springer, (2004)
A. Hotho, S. Staab, and G. Stumme. Proc. of the 7th European Conference on Principles and Practice of Knowledge Discovery in Databases, PKDD, volume 2838 of LNCS, page 217-228. (2003)