Nishant Kumar Pathak , Dr. Harmaninderjit Singh Sidhu. “A Survey on Energy-Efficient Clustering Techniques and Mobile-Agent Based Data Aggregation Techniques in WSN”. International Journal of Advanced Science and Technology, Vol. 29, no. 08, Oct. 2020, pp. 5563 -77, https://sersc.org/journals/index.php/IJAST/article/view/33034.