Hrbac, R., T. Mlcak, and V. Kolar. “Improving Power Quality With the Use of a New Method of Serial Active Power Filter (SAPF) Control”. Elektronika Ir Elektrotechnika, vol. 23, no. 1, Feb. 2017, pp. 15-20, doi:10.5755/j01.eie.23.1.17578.