1. Switched Mode Power Supplies, Power Semiconductor Applications (Phillips Semiconductors, 1988), pp. 103–225.
2. L. Umanand and S. R. Bhat, Design of Magnetic Components for Switched Mode Power Converters (Wiley Eastern Limited, New Delhi, 1992), pp. 61–65.
3. Design aspects of a switch-mode transformer under wide input voltage variation
4. Dallas Semiconductor Maxim, Application Note AN848, 2001 (unpublished).