TY - JOUR AU - A. R. Knyazev AU - Yu. A. Nepomnyashchii TI - Spectrum of bose system with condensate near the threshold of decay into excitations with parallel momenta JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1974 SP - 269 EP - 274 VL - 19 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1974_19_2_a11/ LA - ru ID - TMF_1974_19_2_a11 ER -