Muhsin Ali, G. ., & Abd Al-Kareem Al-Rubyai, G. . (2006). Design of Round Radial Mode Piezoelectric Transformer for Lamp Ballast Applications. Journal of Engineering and Sustainable Development, 10(4), 101-119. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1775