J. Pührer, S. Heymans, и T. Eiter. Proc. of 7th Extended Semantic Web Conference (ESWC 2010), том 6088 из Lecture Notes in Computer Science, стр. 183-197. Springer Berlin / Heidelberg, (2010)
S. Heymans, R. Korf, M. Erdmann, J. Pührer, и T. Eiter. Proc. of the 2010 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology, 1, стр. 248--255. (2010)