@article{DE_1975_11_5_a6,
     author = {V. G. Skatetsky},
     title = {A certain theorem of {B.} {P.~Demidovi\v{c}}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {835--840},
     year = {1975},
     volume = {11},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_5_a6/}
}