“THE IMPROVEMENT MADE BY THE NONLINEAR PROPORTIONAL INTEGRAL CONTROLLER COMPARED TO THE VARIABLE GAIN PROPORTIONAL INTEGRAL CONTROLLER: N a”. REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, no. 2 (July 3, 2023): 158–163. Accessed July 3, 2024. https://journal.iem.pub.ro/rrst-ee/article/view/235.