Stefano Ferilli Teresa Maria Altomare Basile Nicola Di Mauro Marenglen Biba Floriana Esposito Generalization-Based Similarity for Conceptual Clustering. 13-26 2007 MCD http://dx.doi.org/10.1007/978-3-540-68416-9_2 conf/ecml/2007mcd db/conf/ecml/mcd2007.html#FerilliBMBE07