Dongjoon Hyun No Joon Park Jin Hyun Son Myoung-Ho Kim Efficient processing of aggregation queries in sensor networks. 171-197 2006 20 Distributed and Parallel Databases 3 http://dx.doi.org/10.1007/s10619-006-0133-0 db/journals/dpd/dpd20.html#HyunPSK06