%0 Journal Article
%A M. A. Krasnosel'skii
%A A. V. Pokrovskii
%T Operators of a problem on forced oscillations in systems with
%J Doklady Akademii Nauk
%D 1991
%P 819-822
%V 319
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_319_4_a9/
%G ru
%F DAN_1991_319_4_a9