1. Sato, H.: Sci. Rep. RITU,1951, 13. —Masumoto, M., u.H. Saito: Sci. Rep. RITU1951, 523;1952, 321 u. a. —Pavlovic, D., u.K. Foster: Conference on Magnetism and Magnetic Materials, Boston 1956.
2. Bradley, A.J., u.A.H. Jay: J. Iron Steel Inst.125, 339 (1932).
3. Yamamoto, M., u.J. Watanabé: Sci. Rep. RITU1957, 24.
4. Yamamoto, M., u.S. Taniguchi: Sci. Rep., RITU1956, 112.
5. Williams, H.J., u.R.M. Bozorth: Physic. Rev.55, 673 (1939). — Grabbe, E.M.: Physic. Rev.57, 728 (1940).