@article{TMF_1974_19_2_a10,
     author = {Yu. G. Rudoi and Yu. A. Tserkovnikov},
     title = {Single-particle {Green's} function in an~anisotropic {Heisenberg} model. {III.~Spectrum} and damping for anisotropy of the easy plane type},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {252--268},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_19_2_a10/}
}