1. Liu, H., Lin, X., Liu, C.: Research and Implementation of Ontological QA System based on FAQ. Journal of Convergence Information Technology Vol. 5, N. 3 (2010)
2. Hammo, B., Abu-salem, H., Lytinen, S., Evens, M.: QARAB: A Question Answering System to Support the Arabic Language. In: Workshop on Computational Approaches to Semitic Languages, ACL (2002)
3. Monceaux, L., Robba, I.: Les analyseurs syntaxiques: atouts pour une analyse des questions dans un systme de question-rponse. Actes de Traitement Automatique des Langues Naturelles, Nancy (2002)
4. Gaizauskas, R., Greenwood, M.A., Hepple, M., Roberts, I., Saggion, H.: The University of Sheffields TREC 2004 Q&A Experiments. In: Proceedings of the 13th Text REtrieval Conference (2004)
5. Wang, Y., Wang, W., Huang, C., Chang, T., Yen, Y.: Semantic Representation and Ontology Construction in the Question Answering System. In: CIT 2007, pp. 241–246 (2007)