H.R. Rechenberg, J.P. Sanchez, P. l'Heritier, R. Fruchart. Crystal-field interactions and spin reorientation in (Er$_{1-x}$Dy$_x)_2$Fe$_{14}$B.
Physical Review B: Condensed Matter (1978-1997), American Physical Society, 1987, 36, pp.1865-1871.
⟨in2p3-00017604⟩