Design and analysis of digital audio amplifier using ZVS PWM converter. - Wing Hong Lau; Henry Shu-Hung Chung; C. M. Wu; N. K. Poon (ISCAS (5), 1999)

Synthesis of general impedance with simple dc/dc converters for power processing applications. - Joe C. P. Liu; C. K. Tse; N. K. Poon; Bryan M. H. Pong; William Y. M. Lai (Int. J. Circuit Theory Appl., 2008)