A. Park, R. Quadari, and H. Tsang. 2017 8th IEEE Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON), page 680-684. (October 2017)
M. Aurnhammer, P. Hanappe, and L. Steels. 5th International Semantic Web Conference, ISWC 2006, Athens, GA, USA, volume 4273 of Lecture Notes in Computer Science, page 58--71. Springer-Verlag, (5-9 nov 2006)