Georgios Chatzimilioudis Demetrios Zeinalipour-Yazti Dimitrios Gunopulos Minimum-hot-spot query trees for wireless sensor networks. 33-40 2010 MobiDE http://doi.acm.org/10.1145/1850822.1850829 conf/mobide/2010 db/conf/mobide/mobide2010.html#ChatzimilioudisZG10