1. The study of ozone gas generating technique using high frequency, high voltage dc switching power supply of high ripple voltage;Ketkaew;Journal of King Mongkut's Institute of Technology Ladkrabang.,2005
2. A Study of Switching Frequency Changing in Full Bridge Inverter of Ozone Gas Generating Quantity;Ketkaew;Proceeding of the fourth International Power Conversion Conference, Nagoya Japan.,2007
3. Ketkaew S. The Design of Small Ozonator For Hydrogen Sulfide (H2S) Smell Mitigation in Chicken Food Production. Proceedings of Ramkhamhaeng University, International Research Conference 2010 (RUIRC 2010). January 13-14, 2011, p. 137-145.
4. Ketkaew S. A Study of Result Comparating of DC Source High Ripple Voltage Changing of Ozone Gas Quantity. The 2nd Joint Internatinal Conference on Sustainable Energy and Environment (SEE 2006), Technology and Policy Innovations, Swissotel NAI LERT PARK, Bangkok, Thailand, 21-23 November, 2006,Volume 1, p. 302-305.
5. TL 494 Data sheet, Pulse-width- modulation control circuits, Texas Instruments, 2002, p. 1-10.