“EFFICIENT METHOD OF HARMONIC ANALYSIS OF THREE-PHASE CIRCUITS WITH NONLINEAR CONTROLLED SWITCHING ELEMENTS”. REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE, vol. 67, no. 1, Mar. 2022, pp. 47-52, https://journal.iem.pub.ro/rrst-ee/article/view/129.