M. Hearst. Proceedings of the 14th conference on Computational linguistics, 2, Seite 539--545. Stroudsburg, PA, USA, Association for Computational Linguistics, (1992)
B. Martins, H. Manguinhas, und J. Borbinha. Proceedings of the International Conference on Semantic Computing, Seite 1--9. IEEE Computer Society, (August 2008)
E. Breck, Y. Choi, und C. Cardie. IJCAI'07: Proceedings of the 20th International Joint Conference on Artifical Intelligence, Seite 2683--2688. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2007)