%0 Journal Article
%A Yu. L. Shmul'yan
%T Hellinger's operator integral and some of its uses
%J Doklady Akademii Nauk
%D 1958
%P 722-725
%V 120
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_120_4_a9/
%G ru
%F DAN_1958_120_4_a9