Rata, G., P. Norkevicius, and M. Rata. “The Study of the Deforming Regime of AC/AC Converter Using Fourier and Multiresolution Analysis”. Elektronika Ir Elektrotechnika, vol. 121, no. 5, May 2012, pp. 7-12, doi:10.5755/j01.eee.121.5.1643.