%0 Journal Article %A D. N. Zubarev %A M. V. Tokarchuk %T Nonequilibrium thermofield dynamics and the nonequilibrium statistical operator method. I.~Basic relations %J Teoretičeskaâ i matematičeskaâ fizika %D 1991 %P 286-310 %V 88 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1991_88_2_a7/ %G ru %F TMF_1991_88_2_a7