“A NOVEL FAULT TOLERANT ASYMMETRICAL 21-LEVEL INVERTER TOPOLOGY WITH REDUCED COMPONENTS”. REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE, vol. 68, no. 2, July 2023, pp. 200-5, https://doi.org/10.59277/RRST-EE.2023.68.2.14.