Burhan Abdullah, Q., Abdulghani Alabady, S., M. Salleh, F., & S. Khan, M. (2025). A Review of Hierarchical Routing Protocols in Wireless Sensor Networks: Types and Recent Developments. Al-Rafidain Engineering Journal (AREJ), 30(2), 1–15. https://doi.org/10.33899/arej.2025.157162.1387