Hardik Vakharia, and Neelam Bhadauria. “OPTIMUM PMU PLACEMENT TECHNIQUES - A COMPARATIVE STUDY”. International Journal of Advance Research in Engineering, Science & Technology 3, no. 4 (April 25, 2016): 155–163. Accessed October 19, 2025. https://ijarest.org/index.php/ijarest/article/view/526.