1. UMLS Unified Medical Language System (2005AA release), http://www.nlm.nih.gov/research/umls/umlsdoc.html (January 2005)
2. Baeza-Yates, R.A., Ribeiro-Neto, B.A.: Modern Information Retrieval. ACM Press / Addison-Wesley (1999)
3. Carreras, X., Màrquez, L.: Introduction to the CoNLL-2004 Shared Task: Semantic Role Labeling. In: Proceedings of the Eighth Conference on Natural Language Learning (CoNLL-2004), Boston, MA, USA, Mayo (2004)
4. Fabre, C., Sebillot, P.: Semantic interpretation of binomial sequences and information retrieval. In: Methods and Applications (CIMA). Symposium on Advances in Intelligent Data Analisys (AID), editors, Proceedings of the Symposium on Advances in Intelligent Data Analisys, Rochester, USA (1999)
5. Gay, L.S., Croft, W.B.: Interpreting nominal compounds for information retrieval. Information Processing and Management 26(1), 21–38 (1990)