Boonchiam, P. “Power Semiconductor Devices for High Power Current Source Converters-Overview of a Symmetrical Emitter Turn-off (ETO) Thyristor”. Journal of Engineering, RMUTT, vol. 8, Dec. 2006, pp. 83-93, https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242264.