Mauro Mazzieri Aldo Franco Dragoni A Fuzzy Semantics for the Resource Description Framework. 244-261 2008 URSW (LNCS Vol.) http://dx.doi.org/10.1007/978-3-540-89765-1_15 conf/semweb/2007ursw-lncs db/conf/semweb/lncs5327.html#MazzieriD08