Ali, N. D., N. Lysbetti M, F. Firdaus, R. Amri, and E. Ervianto. “Passive Filter Design for Improving Quality of Solar Power”. International Journal of Electrical, Energy and Power System Engineering, Vol. 1, no. 1, Sept. 2018, pp. 11-16, doi:10.31258/ijeepse.1.1.11-16.