Tommaso Melodia Dario Pompili Vehbi C. Gungor Ian F. Akyildiz Communication and Coordination in Wireless Sensor and Actor Networks. 1116-1129 2007 6 IEEE Trans. Mob. Comput. 10 http://doi.ieeecomputersociety.org/10.1109/TMC.2007.1009 db/journals/tmc/tmc6.html#MelodiaPGA07