%0 Journal Article
%A P. P. Zabreiko
%A R. I. Kachurovskii
%A M. A. Krasnosel'skii
%T On a fixed-point principle for operators in a Hilbert space
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1967
%P 93-94
%V 1
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1967_1_2_a9/
%G ru
%F FAA_1967_1_2_a9