%0 Journal Article %A Yu. V. Kozitskii %T Hierarchical vector model of a ferromagnet in the method of collective variables. The Lee–Yang theorem %J Teoretičeskaâ i matematičeskaâ fizika %D 1984 %P 96-108 %V 58 %N 1 %U http://geodesic.mathdoc.fr/item/TMF_1984_58_1_a7/ %G ru %F TMF_1984_58_1_a7