Jianjun Yang Zongming Fei HDAR: Hole Detection and Adaptive Geographic Routing for Ad Hoc Networks. 1-6 2010 ICCCN http://dx.doi.org/10.1109/ICCCN.2010.5560012 conf/icccn/2010 db/conf/icccn/icccn2010.html#YangF10a