A. Coates, H. Lee, und A. Ng. Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics, Volume 15 von JMLR Workshop and Conference Proceedings, Seite 215--223. JMLR W&CP, (2011)
R. Reichart, und A. Rappoport. Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing, Seite 684--693. Stroudsburg, PA, USA, Association for Computational Linguistics, (2010)