A. Vasquez, J.M. Friedt, J.P. Sanchez, Ph. l'Heritier, R. Fruchart. Spin reorientation phenomena in RE$_2$Fe$_1$ $_4$B(RE = Ce, Dy, Er) alloys from $^{57}$Fe and $^{161}$Dy Moessbauer spectroscopies.
Solid State Communications, Elsevier, 1985, 55, pp.783.
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