%0 Journal Article %A N. A. Enaki %A O. B. Prepelitsa %T Collective two-photon processes in the presence of a~thermal electromagnetic field %J Teoretičeskaâ i matematičeskaâ fizika %D 1991 %P 416-429 %V 88 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1991_88_3_a6/ %G ru %F TMF_1991_88_3_a6