1. J. Davies and P. Simpson:Induction Heating Handbook, McGraw Hill Book Co., London (1979).
2. E. May:Industrial High Frequency Electric Power, John Wiley and Sons Inc., New York (1950).
3. G. H. Brown, C. N. Hoyler and R. A. Bierwirth:Theory and Application of Radio Frequency Heating, Chapter 8, D. Van Nostrand Co., New York (1947).
4. N. R. Stansel:Induction Heating, p. 96, McGraw-Hill Book Co., New York (1949).
5. J. T. Vaughan and J. W. Williamson: Trans. Am. Inst. Elect. Engr. 1946, vol. 65, p. 887.