%0 Journal Article
%A Harold Donnelly
%T Elliptic operators and covers of Riemannian manifolds.
%J Mathematische Zeitschrift
%D 1996
%P 303-308
%V 223
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1996__223_3_174921/
%F MZ_1996__223_3_174921