@article{SM_1999_190_4_a4,
     author = {O. G. Parfenov},
     title = {Widths of certain classes of entire functions},
     journal = {Sbornik. Mathematics},
     pages = {561--568},
     publisher = {mathdoc},
     volume = {190},
     number = {4},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1999_190_4_a4/}
}