%0 Journal Article %A D. A. Garanin %A V. S. Lutovinov %T Normal modes and relaxation processes in magnetically ordered materials with single-ion anisotropy %J Teoretičeskaâ i matematičeskaâ fizika %D 1984 %P 133-144 %V 60 %N 1 %U http://geodesic.mathdoc.fr/item/TMF_1984_60_1_a12/ %G ru %F TMF_1984_60_1_a12