Muhsin Ali, Ghusoon, and Ghanim Abd Al-Kareem Al-Rubyai. “Design of Round Radial Mode Piezoelectric Transformer for Lamp Ballast Applications”. Journal of Engineering and Sustainable Development 10, no. 4 (December 1, 2006): 101–119. Accessed April 3, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1775.