E. Yeh, D. Ramage, C. Manning, E. Agirre, und A. Soroa. Proceedings of the 2009 Workshop on Graph-based Methods for Natural Language Processing, Seite 41--49. Stroudsburg, PA, USA, Association for Computational Linguistics, (2009)
R. West, J. Pineau, und D. Precup. Proceedings of the 21st international jont conference on Artifical intelligence, Seite 1598--1603. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2009)
