%0 Journal Article %A V. G. Bar'yakhtar %A D. A. Yablonskii %T On a  representation for spin operators and its use in the theory of magnetism %J Teoretičeskaâ i matematičeskaâ fizika %D 1975 %P 250-259 %V 25 %N 2 %U http://geodesic.mathdoc.fr/item/TMF_1975_25_2_a8/ %G ru %F TMF_1975_25_2_a8