D. Hickok, D. Lesniak, and M. Rowe. 38th Midwest Instruction and Computing Symposium April 8 - 9, 2005. University of Wisconsin-Eau Claire, Eau Claire, WI, (2005)
M. Collins. Proceedings of the 34th annual meeting on Association for Computational Linguistics, page 184--191. Stroudsburg, PA, USA, Association for Computational Linguistics, (1996)
J. Angele, and M. Gesmann. Proceedings of the Second International Conference on Rules and Rule Markup Languages for the Semantic Web, Athens, GA, USA, page 58-66. (2006)
B. Brandherm, J. Haupert, A. Kröner, M. Schmitz, and F. Lehmann. PerCom 2010 Workshops: Proceedings of the 8th Annual IEEE International Conference on Pervasive Computing and Communications Workshops, Mannheim, Germany, page 768-771. (2010)