TY - JOUR AU - V. N. Popov TI - Application of~functional integration to~the~derivation of~the~low-frequency asymptotic behaviour of~Green's functions and kinetic equations for~a~nonideal Bose~gas JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1971 SP - 90 EP - 108 VL - 6 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1971_6_1_a9/ LA - ru ID - TMF_1971_6_1_a9 ER -