Gnaciński, Piotr, and Piotr Klimczak. “Preliminary Study of a 200-KW Induction Motor Supplied With Voltages Containing Subharmonics”. Scientific Journal of Gdynia Maritime University 1, no. 111 (September 23, 2019): 47–56. Accessed December 21, 2024. https://ojs.umg.edu.pl/index.php/sjgmu/article/view/15.