%0 Journal Article %A O. V. Epifanov %T A~differential operator with polinomial coefficiens in classes of entire functions with a~given estimate of the indicator %J Sbornik. Mathematics %D 1982 %P 71-92 %V 42 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1982_42_1_a1/ %G en %F SM_1982_42_1_a1