Tim Leinmüller Christian Maihöfer Elmar Schoch Frank Kargl Improved security in geographic ad hoc routing through autonomous position verification. 57-66 2006 conf/mobicom/2006vanet Vehicular Ad Hoc Networks http://doi.acm.org/10.1145/1161064.1161075 db/conf/mobicom/vanet2006.html#LeinmullerMSK06