@article{ZNSL_1979_92_a26,
     author = {N. A. Shirokov},
     title = {A~remark concerning a~problem of {S.} {M.~Nikolskii}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {312--313},
     year = {1979},
     volume = {92},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_92_a26/}
}