T. Schlemmer, und S. Schmidt. Proceedings of the Sixth International Conference on Concept Lattices and Their Applications (CLA2008), Volume 433 von CEUR Workshop Proceedings, Seite 9--22. Aachen, Sun SITE Central Europe, (Januar 2009)
T. Schlemmer, und S. Schmidt. Proceedings of the Sixth International Conference on Concept Lattices and Their Applications, Seite 9--22. Olomouc, Czech Republic, Palacký University, (Oktober 2008)