Chiara Boldrini Marco Conti Jacopo Jacopini Andrea Passarella HiBOp: a History Based Routing Protocol for Opportunistic Networks. 1-12 2007 conf/wowmom/2007 WOWMOM http://dx.doi.org/10.1109/WOWMOM.2007.4351716 db/conf/wowmom/wowmom2007.html#BoldriniCJP07