%0 Journal Article
%A Roger D. Nussbaum
%T On the Uniqueness of the Topological Degree for k-Set-Contractions.
%J Mathematische Zeitschrift
%D 1974
%P 1-6
%V 137
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1974__137_172052/
%F MZ_1974__137_172052