Aung, Lwin Mar. “Implementation of Multi-Stage Converter and Ultra-Capacitor DC Link-Based Voltage Source Active Power Filter ”. IJRDO - Journal of Electrical And Electronics Engineering (ISSN: 2456-6055) 5, no. 9 (September 12, 2019): 06-10. Accessed November 18, 2019. https://ijrdo.org/index.php/eee/article/view/3190.