Sahu, M. K., and S. Patil. “Enhanced Double Cluster Head Selection Using Ant-Colony Optimization for Energy-Efficient Routing in Wireless Sensor Network”. SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology, Vol. 13, no. 01, June 2021, pp. 35-41, doi:10.18090/samriddhi.v13i01.7.