Paolo Corsini Francesco Marcelloni A fuzzy system for profiling web portal users from web access log. 503-516 2006 17 Journal of Intelligent and Fuzzy Systems 5 http://iospress.metapress.com/openurl.asp?genre=article&issn=1064-1246&volume=17&issue=5&spage=503 db/journals/jifs/jifs17.html#CorsiniM06