Dobrucky, Branislav, Juraj Altus, and Pavol Spanik. “Synergic Influence of Power Electronics, Electric Traction and Electro-Energetics”. Communications - Scientific letters of the University of Zilina 3, no. 2-3 (September 30, 2001): 16-28. Accessed April 6, 2026. http://journals.uniza.sk/index.php/communications/article/view/1437.