%0 Journal Article %A V. P. Kalashnikov %T Response to a~mechanical perturbation and the Green's functions for nonequilibrium systems %J Teoretičeskaâ i matematičeskaâ fizika %D 1971 %P 94-108 %V 9 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1971_9_1_a7/ %G ru %F TMF_1971_9_1_a7