%0 Journal Article
%A Zoltán Sasvári
%A Heinz Langer
%T Definitizing polynomials of unitary and Hermitian operators in Pontrjagin spaces.
%J Mathematische Annalen
%D 1990
%P 231-244
%V 288
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1990__288_1_164734/
%F MAN_1990__288_1_164734