S. Bloehdorn, und A. Hotho. Proceedings of the MSW 2004 workshop at the 10th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, Seite 70-87. (August 2004)
G. Stumme. Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004), Volume 3127 von LNCS, Seite 109-125. Heidelberg, Springer, (2004)