An improved zero-voltage and zero-current-switching full-bridge PWM converter using a simple resonant circuit. - Kyoung-Wook Seok; Bong-Hwan Kwon (IEEE Trans. Ind. Electron., 2001)

A novel single-stage half-bridge AC-DC converter with high power factor. - Kyoung-Wook Seok; Bong-Hwan Kwon (IEEE Trans. Ind. Electron., 2001)