Muhsin Ali G, Abd Al-Kareem Al-Rubyai G. Design of Round Radial Mode Piezoelectric Transformer for Lamp Ballast Applications. J. eng. sustain. dev. 2006;10(4):101-119. Accessed July 3, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1775