M. Freiberg. 457. University of Würzburg, Institute of Computer Science, Department of Artificial Intelligence and Applied Informatics, Am Hubland, D-97074 Würzburg, Germany, (марта 2009)
M. Freiberg, и F. Puppe. Proceedings of the 8th Workshop on Knowledge Engineering and Software Engineering (KESE8), CEUR Proceedings (to appear), (2012)
M. Freiberg, и F. Puppe. Proceedings of the International Conference on Knowledge Engineering and Ontology Development (KEOD 2012), SciTePress Digital Library, (2012)