%0 Journal Article
%A A. F. Leont'ev
%T On convexity of the region in which the solution of a differential equation of infinite order is regular
%J Doklady Akademii Nauk
%D 1960
%P 1019-1022
%V 132
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_132_5_a12/
%G ru
%F DAN_1960_132_5_a12