Saeed, Wafaa, and Layth Tawfeeq. “Voltage Collapse Optimization for the Iraqi Extra High Voltage 400 KV Grid Based on Particle Swarm Optimization”. Iraqi Journal for Electrical and Electronic Engineering 13, no. 1 (July 31, 2017): 17–31. Accessed December 13, 2025. https://ijeee.journalpath.com/ijeee/article/view/230.