1. Lawler, J. C., Davis, M. J. andGriffith, E. C. (1960) Electrical characteristics of the skin.J. Invest. Dermatol. 34, 301–308.
2. Oka, S. andNakata, O. (1962)Theory of dielectric materials in solid state. Iwanami Shoten, Tokyo, p. 80 (in Japanese).
3. Advances in biological and medical physics;H. P. Schwan,1957
4. The Mathematical Society of Japan (1968)Mathematical dictionary, Iwanami Shoten, Tokyo, 622 (in Japanese).
5. Tregear, R. T. (1966)Physical functions of skin. Academic Press, London, 64, 68.