H. Allert, H. Markannen, и C. Richter. Proceedings of the 2nd International Workshop on Learner-Oriented Knowledge Management and KM-Oriented Learning (LOKMOL 06), in conjunction with the First European Conference on Technology-Enhanced Learning (ECTEL 06), стр. 115-125. (02.10.2006)
M. Vargas-Vera, E. Motta, J. Domingue, M. Lanzoni, A. Stutt, и F. Ciravegna. EKAW '02: Proceedings of the 13th International Conference on Knowledge Engineering and Knowledge Management. Ontologies and the Semantic Web, стр. 379--391. London, UK, Springer-Verlag, (2002)
P. Cimiano, G. Stumme, A. Hotho, и J. Tane. Proceedings of the The Second International Conference on Formal Concept Analysis (ICFCA 04), стр. 189-207. Springer, (2004)