Deepali Virmani  and  Satbir Jain,  Construction Of Decentralized Lifetime Maximizing Tree for Data Aggregation in Wireless Sensor Networks.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2009, vol. 28(4). 582 - 591
    [viewed 16 December 2019]. Available from: https://publications.waset.org/pdf/9441.