1. Ch. E. Guillaume, Compt. Rendue Acad. Sci., Paris 125, 235 (1897).
2. E. F. Wasserman, in Ferromagnetic Materials, edited by K. H. J. Buschov and E. P. Wohlfarth, Elsevier, Amsterdam, 1990, Vol. 6, p. 240.
3. P. Chevenard, Compt. Rendue Acad. Sci., Paris 122, 594 (1921).
4. L. D. Landau and E. M. Lifshitz, Statistical Physics, Pergamon Press, N.Y., part 1 (1980) [Russian original, Nauka, Moscow, 1976].
5. M. Matsui and S. Shikazumi, J. Phys. Soc. Jpn. 45, 458 (1978).