M. Reinberger, P. Spyns, W. Daelemans, and R. Meersman. In Proceedings of the International Conference on Ontologies, Databases
and Applications of Semantics (ODBASE, page 803-819. Springer-Verlag, (2003)
T. Hofmann, J. Puzicha, and M. Jordan. Proceedings of the 1998 conference on Advances in neural information
processing systems II, page 466-472. Cambridge, MA, USA, MIT Press, (1999)