%0 Journal Article %A L. A. Pokrovskii %T Nonequilibrium statistical operator method in the theory of a~single-mode laser based on two-level atoms %J Teoretičeskaâ i matematičeskaâ fizika %D 1978 %P 102-117 %V 37 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1978_37_1_a9/ %G ru %F TMF_1978_37_1_a9