@article{TMF_1991_86_1_a1,
     author = {N. N. Bogolyubov and V. A. Moskalenko},
     title = {On~the existence of superconductivity in the {Hubbard} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {16--30},
     year = {1991},
     volume = {86},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1991_86_1_a1/}
}