%0 Journal Article %A V. V. Zverev %T Calculation of equilibrium mean values in a system of molecules interacting with a radiation field %J Teoretičeskaâ i matematičeskaâ fizika %D 1977 %P 410-415 %V 32 %N 3 %U http://geodesic.mathdoc.fr/item/TMF_1977_32_3_a11/ %G ru %F TMF_1977_32_3_a11