@article{IVM_1978_5_a3,
     author = {A. N. Grin'},
     title = {The membership of a~mapping in a~certain class},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {32--38},
     publisher = {mathdoc},
     number = {5},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1978_5_a3/}
}