Silvana Badaloni Marco Falda Massimiliano Giacomin Integrating quantitative and qualitative fuzzy temporal constraints. 187-200 2004 17 AI Commun. 4 http://iospress.metapress.com/openurl.asp?genre=article&issn=0921-7126&volume=17&issue=4&spage=187 db/journals/aicom/aicom17.html#BadaloniFG04