1. P.J. Brown, Acta Cryst. 15(1962)608.
2. P.J. Gellings, G. Gierman, D. Koster and J. Kuit, Z. Metallk. 71(1980)70.
3. H. Bablik, F. Götzl and F. Hall, Z. Metallk. 30(1938)248.
4. A.S. Koster and J.C. Schoone, Acta Crystallogr. B37(1981)1905.
5. D.C. Cook, Mössbauer effect study of four metal powder galvanneal standards, Final Technical Report No. ODUDCC0191 (1991).