Jiya, Immanuel, et al. “PWM and Duty Ratio Switching of Multiple Input Converters Using FPGAs: A Digital Logic Circuit and VHDL Hybrid Approach”. International Journal of Engineering & Technology, vol. 7, no. 4, Nov. 2018, pp. 4519-27, https://doi.org/10.14419/ijet.v7i4.20073.