@ARTICLE{fatma09, 
author={Bouabdallah, F. and Bouabdallah, N. and Boutaba, R.}, 
journal={Vehicular Technology, IEEE Transactions on},
 title={On Balancing Energy Consumption in Wireless Sensor Networks}, 
year={2009}, 
month=july , 
volume={58}, 
number={6}, 
pages={2909 -2924}, 
}