S. BHUVANESWARI, V. AZHAHARASAN. An Energy Centric Hierarchical Opportunistic Cognitive Routing Protocol for Reliable and Energy Efficient Wireless Sensor Networks. Journal of Online Engineering Education, [S. l.], v. 17, n. 2, p. 77–86, 2026. Disponível em: https://onlineengineeringeducation.com/index.php/joee/article/view/139. Acesso em: 4 sep. 2026.