Corrado Mencar Ciro Castiello Anna Maria Fanelli Fuzzy User Profiling in e-Learning Contexts. 230-237 2008 KES (2) http://dx.doi.org/10.1007/978-3-540-85565-1_29 conf/kes/2008-2 db/conf/kes/kes2008-2.html#MencarCF08