Loukas Lazos Radha Poovendran James A. Ritcey Probabilistic detection of mobile targets in heterogeneous sensor networks. 519-528 2007 conf/ipsn/2007 IPSN http://doi.acm.org/10.1145/1236360.1236426 db/conf/ipsn/ipsn2007.html#LazosPR07