T. JAN, A. JEHANGIR, A. ALI, S. HAQ, and S. R. HASSNAIN. 2014. “An Energy Efficient Routing Protocol for Wireless Sensor Networks Based on Two Relay Nodes”. Sindh University Research Journal - SURJ (Science Series) 46 (2). https://sujo.usindh.edu.pk/index.php/SURJ/article/view/5330.