%0 Journal Article
%A I. S. Iokhvidov
%T Unitary extensions of isometric operators in the Pontrjagin space $\Pi_1$ and continuations in the $\mathfrak{P}_1$ 

%J Doklady Akademii Nauk
%D 1967
%P 758-761
%V 173
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_173_4_a7/
%G ru
%F DAN_1967_173_4_a7