%0 Journal Article
%A Yu. N. Valitskii
%T A four-point problem for a differential equation in a Banach space
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1981
%P 69-70
%V 15
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1981_15_4_a6/
%G ru
%F FAA_1981_15_4_a6