Domenico Beneventano Sonia Bergamaschi Francesco Guerra Maurizio Vincini The SEWASIE MAS for semantic search. 793-798 2007 ICDIM http://dx.doi.org/10.1109/ICDIM.2007.4444321 conf/icdim/2007 db/conf/icdim/icdim2007.html#BeneventanoBGV07