Raza, S. A., T. Mahmood, and S. B. A. Bukhari. “OPTIMUM OVERCURRENT RELAY COORDINATION: A REVIEW”. The Nucleus 51, no. 1 (March 5, 2014): 37–49. Accessed November 22, 2024. http://thenucleuspak.org.pk/index.php/Nucleus/article/view/721.