Robinchandra Singh, Usham, and Sudipta Roy. “An Energy Efficient Cluster Based Group Key Management Scheme Using Elliptical Curve Cryptography in Wireless Sensor Network”. International Journal of Engineering & Technology, vol. 7, no. 4, Nov. 2018, pp. 4930-8, https://doi.org/10.14419/ijet.v7i4.17987.