Ibraheem, Ibraheem. “A Digital-Based Optimal AVR Design of Synchronous Generator Exciter Using LQR Technique”. Al-Khwarizmi Engineering Journal 7, no. 1 (March 1, 2019): 82-94. Accessed November 30, 2019. http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/472.