%0 Journal Article
%A S. F. Prokoptsev
%T Some properties of linear combinations of functions close to exponential functions
%J Doklady Akademii Nauk
%D 1971
%P 1018-1021
%V 199
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_199_5_a8/
%G ru
%F DAN_1971_199_5_a8