Paulo Quaresma, Irene Pimenta Rodrigues. An Information Retrieval System with Cooperative Behaviour. In Torbjørn Nordgård, editor, Proceedings of the 12th Nordic Conference of Computational Linguistics, NODALIDA 1999, Trondheim, Norway, December 9-10, 1999. pages 182-190, Department of Linguistics, Norwegian University of Science and Technology, Norway, 1999. [doi]