%0 Journal Article
%A M. Altman
%T The cosine equation method for the eigenproblem of bounded normal operators in Hilbert space
%J Annales Polonici Mathematici
%D 1964
%P 353-357
%V 16
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-16-3-353-357/
%R 10.4064/ap-16-3-353-357
%G en
%F 10_4064_ap_16_3_353_357