Hierarchical Bayesian Clustering for Automatic Text Classification (1995) http://citeseer.ist.psu.edu/135293.html
Context Clustering for Word Sense Disambiguation Based on Modeling http://www.google.com/url?sa=t&ct=res&cd=6&url=http%3A%2F%2Facl.ldc.upenn.edu%2Facl2004%2Fsenseval%2Fps%2Fniu1.ps&ei=7WTnRruJG6eSiwGF1-VJ&usg=AFQjCNF4gCUeuvakqmMmW7lWnVkkwIE9Fg&sig2=44Xa7ra9IbUVor-vtkTeeQ
Ontology-Based Free-Form Query Processing for the Semantic Web http://www.google.com/url?sa=t&ct=res&cd=6&url=http%3A%2F%2Fwww.deg.byu.edu%2Fproposals%2FThesisPro.vickers.pdf&ei=dhsYR6SiHZSSiwGjxtS3Dw&usg=AFQjCNGjV0xo7KTjJ7DTQlv8YocAquaL9g&sig2=lRQrBpS7xDGo8YQeMn5wNA
Useful:
www.schemaweb.info database of ontologies