Shirshanka Das Alok Nandan Giovanni Pau SPAWN: a swarming protocol for vehicular ad-hoc wireless networks. 93-94 2004 conf/mobicom/2004vanet Vehicular Ad Hoc Networks http://doi.acm.org/10.1145/1023875.1023893 db/conf/mobicom/vanet2004.html#DasNP04