เกียรติสุขคณาธร ไ. . . ., and วัจนเทพินทร์ น. . . “Power Quality Improvement by Using a 15-Degree Phase Shifting Transformer for 24-Pulse Rectifiers”. Engineering and Technology Horizons, vol. 34, no. 1, June 2020, pp. 9-16, https://ph01.tci-thaijo.org/index.php/lej/article/view/241395.