Brahim, Elbhuru, Saadane Rachid, Alba-Pagès Zamora, and Driss Aboutajdine. 2009. “Stochastic and Balanced Distributed Energy-Efficient Clustering (SBDEEC) for Heterogeneous Wireless Sensor Networks”. INFOCOMP Journal of Computer Science 8 (3):11-20. http://177.105.60.18/index.php/infocomp/article/view/266.