%0 Journal Article %A G. V. Vasyutinskii %A A. A. Kazakov %T Specific heat and mean energy of a~Heisenberg ferromagnet in the Green's function method %J Teoretičeskaâ i matematičeskaâ fizika %D 1993 %P 127-134 %V 95 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1993_95_1_a11/ %G ru %F TMF_1993_95_1_a11