efficient-design-and-comparative-performance-analysis-of-pid-controller-applied-to-automatic-voltage-regulator-employing-symbiotic-organisms-search-algorithm==>>efficient-design-and-comparative-performance-analysis-of-pid-controller-applied-to-automatic-voltage-regulator-employing-symbiotic-organisms-search-algorithmhttps://indexive.com/uploads/papers/icatces2018-170.pdf