%0 Journal Article
%A Pták, Vlastimil
%T The spectral radii of an operator and its modulus
%J Commentationes Mathematicae Universitatis Carolinae
%D 1976
%P 273-279
%V 17
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1976__17_2_a5/
%G en
%F CMUC_1976__17_2_a5