1. J. Smit and H. P. J. Wijn, Ferrites (Phillips Technical Library, Eindhoven, The Netherlands, 1959), p. 134.
2. T. Sato and Y. Sakaki, IEEE Trans. Magn. 26, 2894 (1990).IEMGAQ0018-9464
3. T. Akashi, Trans. Jpn. Inst. Metals 2, 171 (1961).TJIMAA0021-4434
4. T. Akashi, I. Sugano, T. Okuda, and T. Tsuji, Proceedings of the First International Conference on Ferrites, 1970 (unpublished), p. 96.
5. T. Sano, A. Morita, and A. Matsukawa, Proceedings of the Fifth International Conference on Ferrites, 1989 (unpublished), p. 595.