%0 Journal Article %A V. A. Slyusarev %A R. P. Yankelevich %T On the impossibility of a~phase transition to the superradiant state in a~thermodynamically equilibrium gauge-invariant system %J Teoretičeskaâ i matematičeskaâ fizika %D 1979 %P 124-129 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1979_40_1_a11/ %G ru %F TMF_1979_40_1_a11