Kongput, P., S. Punnachaiya, and D. Thong-Aram. “Design of Low Parasitic Capacitance High Frequency High Voltage Transformer”. Engineering and Applied Science Research, vol. 40, no. 2, June 2014, pp. 255-6, https://ph01.tci-thaijo.org/index.php/easr/article/view/19106.