@article{TMF_1975_23_2_a10,
     author = {I. A. Vakarchuk},
     title = {Density matrices of a {many-Boson} system at low temperatures},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {260--272},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_23_2_a10/}
}