M. Nunes, F. Vieira, C. Zavaglia, C. Sossolote, and J. Hernandez. Relatórios Técnicos do ICMC, 42. Instituto de Ciências Matemáticas e de Computação - Universidade de São Paulo, São Carlos-SP, (Setembro 1996)
G. Neumann, and B. Sacaleanu. Evaluating Systems for Multilingual and Multimodal Information Access: 4th Workshop of the Cross-Language Evaluation Forum, CLEF 2003, Trondheim, Norway, volume 3237 of Lecture Notes in Computer Science, Springer, Berlin, (2004)
M. Carey, D. DeWitt, and S. Vandenberg. Proceedings of the 13th Annual ACM Conference on
the Management of Data, page 413--423. Chicago, Illinois, (June 1988)