B. Yu, und M. Singh. Cooperative Information Agents IV - The Future of Information Agents in Cyberspace, Volume 1860 von Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2000)
S. Doerfel, R. Jäschke, und G. Stumme. Formal Concept Analysis, Volume 7278 von Lecture Notes in Artificial Intelligence, Seite 77--95. Berlin/Heidelberg, Springer, (Mai 2012)