Frivaldsky, Michal, Branislav Dobrucky, Giacomo Scelba, Pavol Spanik, and Peter Drgona. “Bidirectional Step-Up/Step-Down DC-DC Converter With Magnetically Coupled Coils”. Communications - Scientific letters of the University of Zilina 15, no. 3 (August 31, 2013): 21-25. Accessed April 6, 2026. http://journals.uniza.sk/index.php/communications/article/view/682.