An Information Retrieval System with Cooperative Behaviour Paulo Quaresma author Irene Pimenta Rodrigues author 2000-12 text Proceedings of the 12th Nordic Conference of Computational Linguistics (NODALIDA 1999) Torbjørn Nordgård editor Department of Linguistics, Norwegian University of Science and Technology, Norway Trondheim, Norway conference publication quaresma-pimenta-rodrigues-2000-information https://aclanthology.org/W99-1019/ 2000-12 182 190