1. A’́it-Mokhtar, S., Chanod, J.-P., Roux, C.: A multi-input dependency parser. In: Proceedings of the Seventh IWPT (International Workshop on Parsing Technologies), Beijing, China (October 2001)
2. Amaral, C., Cassan, A., Figueira, H., Martins, A., Mendes, A., Mendes, P., Pinto, C., Vidal, D.: Priberam’s question answering system in qa@clef 2007. In: Working Notes for the CLEF 2007 Workshop (2007)
3. Buscaldi, D., Benajiba, Y., Rosso, P., Sanchis, E.: The UPV at QA@CLEF 2007. In: Working Notes for the CLEF 2007 Workshop (2007)
4. Cabral, L.M., Costa, L.F., Santos, D.: Esfinge at CLEF 2007: First steps in a multiple question and multiple answer approach. In: Working Notes for the CLEF 2007 Workshop (2007)
5. Cassan, A., Figueira, H., Martins, A., Mendes, A., Mendes, P., Pinto, C., Vidal, D.: Priberam’s question answering system in a cross-language environment. In: Working Notes for the CLEF 2006 Workshop (2006)