1. See, for example, K. A. Gschneidner, Jr., Rare Earth Alloys (D. Van Nostrand Co., Inc., Princeton, N.J., 1961), pp. 3–66.
2. R. M. Bozorth and J. H. Van Vleck, Phys. Rev. 118, 1493 (1960).PHRVAO0031-899X
3. O. V. Lounasmaa, Phys. Rev. 133, A502 (1964).PHRVAO0031-899X
4. N. G. Neresen, C. E. Olsen, and G. P. Arnold, Phys. Rev. 135, A176 (1964).PHRVAO0031-899X
5. M. Curry, S. Legvold, and F. H. Spedding, Phys. Rev. 117, 953 (1960).PHRVAO0031-899X