%0 Journal Article
%A M. Breuer
%A R.S. Butcher
%T Fredholm Theories of Mixed Type with Analytic Index Functions.
%J Mathematische Annalen
%D 1974
%P 31-42
%V 209
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1974__209_162582/
%F MAN_1974__209_162582