S. Bhuvaneswari, V. Azhaharasan. An Energy Centric Hierarchical Opportunistic Cognitive Routing Protocol for Reliable and Energy Efficient Wireless Sensor Networks. joee [Internet]. 2026 Sep. 3 [cited 2026 Sep. 4];17(2):77-86. Available from: https://onlineengineeringeducation.com/index.php/joee/article/view/139