K. Lenin. “Voltage Profile Augmentation and Minimization of Real Power Loss in Transmission Lines by Using Improved Hybrid Particle Swarm Optimization-Based on Harmony Search Algorithm”. Global Journals of Research in Engineering, vol. 14, no. F3, Mar. 2014, pp. 73-79, https://engineeringresearch.org/index.php/GJRE/article/view/1109.