%0 Journal Article %A V. I. Yukalov %T On the description of quasiparticles by Green's functions %J Teoretičeskaâ i matematičeskaâ fizika %D 1973 %P 422-428 %V 17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1973_17_3_a9/ %G ru %F TMF_1973_17_3_a9