%0 Journal Article
%A Grzaslewicz, Ryszard
%T Extreme positive contractions on the Hilbert space
%J Portugaliae mathematica
%D 1989
%P 341-349
%V 46
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1989__46_4_115675/
%G en
%F PORMA_1989__46_4_115675