Manam, R., and S. R. Rayapudi. “Sensitive Constrained Optimal PMU Allocation With Complete Observability for State Estimation Solution”. Engineering, Technology & Applied Science Research 7, no. 6 (December 18, 2017): 2240–2250. Accessed April 27, 2026. https://www.etasr.com/index.php/ETASR/article/view/1542.