R.Shivakumar, S.Sowranchana,M.Sugumaran. “Stability Improvement in Multimachine Power Systems Using Nature Inspired Algorithms”. International Journal of Advanced Science and Technology, Vol. 29, no. 10s, May 2020, pp. 6407 -18, http://sersc.org/journals/index.php/IJAST/article/view/23103.