Yasser Rahmati Kukandeh, Yasser Rahmati Kukandeh, and Mohammad Hossein Kazemi. 2011. “Controlling Voltage and Frequency of a Power Network With Microgrid Using Droop Method”. Global Journals of Research in Engineering 11 (F6):1-4. https://engineeringresearch.org/index.php/GJRE/article/view/247.