Michele Ruta Tommaso Di Noia Eugenio Di Sciascio Francesco M. Donini Giacomo Piscitelli Semantic Based Collaborative P2P in Ubiquitous Computing. 143-149 2005 conf/webi/2005 Web Intelligence http://doi.ieeecomputersociety.org/10.1109/WI.2005.130 db/conf/webi/webi2005.html#RutaNSDP05