@article{TMF_1974_19_2_a11,
     author = {A. R. Knyazev and Yu. A. Nepomnyashchii},
     title = {Spectrum of bose system with condensate near the threshold of decay into excitations with parallel momenta},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {269--274},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_19_2_a11/}
}