@article{TM_1975_136_a31,
     author = {Yu. A. Tserkovnikov and Yu. G. Rudoi},
     title = {The spectrum and correlation functions of {Heisenberg's} anisotropic ferromagnet},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {414--424},
     year = {1975},
     volume = {136},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1975_136_a31/}
}