Luciano Gerber, Alvaro A. A. Fernandes. An Abstract Algebra for Knowledge Discovery in Databases. In Georg Gottlob, András A. Benczúr, János Demetrovics, editors, Advances in Databases and Information Systems, 8th East European Conference, ADBIS 2004, Budapest, Hungary, September 22-25, 2004, Proceesing. Volume 3255 of Lecture Notes in Computer Science, pages 83-98, Springer, 2004. [doi]