R. Neßelrath, and D. Porta. Proceedings of the 7th IJCAI Workshop on Knowledge and Reasoning in Practical Dialogue Systems (KRPD-11). Twenty-Second International Joint Conference On Artificial Intelligence (IJCAI -11), Barcelona, Spain, (July 2011)
R. Nesselrath, and D. Porta. Proceedings of the 7th IJCAI Workshop on Knowledge and Reasoning in Practical Dialogue Systems (KRPDS-11), page 37-47. (July 2011)
C. Morbidoni, G. Tummarello, O. Erling, and R. Bachmann-Gmür. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 533--546. Berlin, Heidelberg, Springer Verlag, (November 2007)