Sorabh Gandhi Rajesh Kumar 0003 Subhash Suri Target Counting under Minimal Sensing: Complexity and Approximations. 30-42 2008 ALGOSENSORS http://dx.doi.org/10.1007/978-3-540-92862-1_4 conf/algosensors/2008 db/conf/algosensors/algosensors2008.html#GandhiKS08