Flávia Coimbra Delicato Fábio Protti Luci Pirmez José Ferreira de Rezende An efficient heuristic for selecting active nodes in wireless sensor networks. 3701-3720 2006 50 Computer Networks 18 http://dx.doi.org/10.1016/j.comnet.2006.04.005 db/journals/cn/cn50.html#DelicatoPPR06