P. Špánik, M. Frivaldský, P. Drgoňa, and J. Kandráč, “Efficiency Increase of Switched Mode Power Supply through Optimization of Transistor’s Commutation Mode”, ELEKTRON ELEKTROTECH, vol. 105, no. 9, pp. 49–52, Oct. 2010, doi: 10.5755/j02.eie.9168.