%0 Journal Article %A E. V. Gusev %T Thermodynamics and excited states of the Heisenberg model %J Teoretičeskaâ i matematičeskaâ fizika %D 1985 %P 303-311 %V 63 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1985_63_2_a12/ %G ru %F TMF_1985_63_2_a12