Hren, Alenka, and Franc Mihalič. “A STRAIGHTFORWARD ANALYTICAL WAY OF EVALUATING THE SINGLE-PHASE INVERTER SPWM FREQUENCY SPECTRUM”. Journal of Energy Technology, vol. 10, no. 4, Feb. 2024, pp. 11-27, https://doi.org/10.18690/jet.10.4.11-27.2017.