1. Lecture Notes in Computer Science;D. Santos,2009
2. Brants, T.: TnT – A Statistical Part-Of-Speech Tagger. In: Proceedings of the 6th Applied NLP Conference (ANLP 2000), Seattle, WA, United States (2000)
3. Atserias, J., Casas, B., Comelles, E., González, M., Padró, L., Padró, M.: FreeLing 1.3: Syntactic and Semantic Services in an Open-Source NLP Library. In: Proceedings of the 5th International Conference on Language Resources and Evaluation (LREC 2006), pp. 48–55 (2006)
4. Lecture Notes in Computer Science;D. Ferrés,2008