%0 Journal Article
%A Gonzalez, Manuel
%A Martinon, Antonio
%T Operational quantities derived from the norm and generalized Fredholm theory
%J Commentationes Mathematicae Universitatis Carolinae
%D 1991
%P 645-657
%V 32
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1991__32_4_a6/
%G en
%F CMUC_1991__32_4_a6