%0 Journal Article %A Yu. A. Tserkovnikov %T A~method of solving infinite systems of equations for two-time thermal Green's functions %J Teoretičeskaâ i matematičeskaâ fizika %D 1981 %P 219-233 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1981_49_2_a7/ %G ru %F TMF_1981_49_2_a7