1. Akashi, T. (1961), Trans. J. Inst. Metals, 2, 171.
2. Baba, P.D. (1972), Argentina, G.M., Courtney, W.E., Dionne, G.F., and Temme, D.H., IEEE Trans. Mag., 8(1), 83.
3. Beer, A. (1966) and Schwartz, T., ibid, 2, 470.
4. Berger, M.H.(1989)Laval, J.Y., Kools, F. and Roelofsma, J., Advances in Ferrites, Vol 1-Oxford and IBH Publishing Co., New Delhi, India, 619 Aedermannsdorf, Switzerland, 163.
5. Brown, F. (1955) and Gravel, C.L., Phys. Rev., 97, 55.