M. Ehrig, P. Haase, N. Stojanovic, and M. Hefke. Proceedings of the 13th European Conference on Information Systems (ECIS 2005), Regensburg, Germany, , (May 2005)
P. Haase, and L. Stojanovic. Proceedings of the Second European Semantic Web Conference, 3532, page 182--197. Heraklion, Crete, Greece, Springer, (2005)