B. Elliott, E. Cheng, C. Thomas-Ogbuji, and Z. Ozsoyoglu. Proceedings of the 2009 International Database Engineering & Applications Symposium, page 31--42. New York, NY, USA, ACM, (2009)
C. Sporleder. 15th European Conference on Artificial Intelligence (ECAI'02): Workshop on Machine Learning and Natural Language Processing for Ontology Engineering, Lyon, France, (2002)
T. Eliassi-Rad, and T. Critchlow. SAC '05: Proceedings of the 2005 ACM symposium on Applied computing, page 511--518. New York, NY, USA, ACM Press, (2005)
W. Petersen. Electronic Notes in Theoretical Computer Science, (2004)Proceedings of the joint meeting of the 6th Conference on Formal Grammar and the 7th Conference on Mathematics of Language.
C. Ullrich, and A. Chen. Proceedings of the World Conference on Educational Multimedia, Hypermedia & Telecommunications (ED-MEDIA 2004), page 4059--4063. AACE, (2004)
J. Pitrat. COGNITIVA 90: Proceedings of the third COGNITIVA symposium on At the crossroads of artificial intelligence, cognitive science, and neuroscience, page 119--128. Amsterdam, The Netherlands, The Netherlands, North-Holland Publishing Co., (1991)