%0 Journal Article %A Yu. G. Rudoi %A Yu. A. Tserkovnikov %T Single-particle Green's function in an~anisotropic Heisenberg model. III.~Spectrum and damping for anisotropy of the easy plane type %J Teoretičeskaâ i matematičeskaâ fizika %D 1974 %P 252-268 %V 19 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1974_19_2_a10/ %G ru %F TMF_1974_19_2_a10