Sekerak, Peter, Valeria Hrabovcova, Matus Onufer, Pavol Rafajdus, and Lukas Kalamen. “Losses, Efficiency and Thermal Behavior of the Synchronous Motors With Different PM Materials”. Communications - Scientific letters of the University of Zilina 15, no. 2A (July 31, 2013): 46-54. Accessed April 6, 2026. http://journals.uniza.sk/index.php/communications/article/view/654.