Jena, Debashisha, and Mokenapalli Vijay. 2012. “A Comparison of PI Tuning by Direct Search and Genetic Algorithm for Optimal Control of AGC in Continuous-Discrete Mode”. Power Research - A Journal of CPRI, September, 113–122. https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/374.