%0 Journal Article
%A V. A. Khatskevich
%T An application of the contraction mapping principle in the theory of operators in an indefinite metric space
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1978
%P 88-89
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1978_12_1_a18/
%G ru
%F FAA_1978_12_1_a18