%0 Journal Article
%A Christian G. Simader
%T An Elementary Proof of Harnack's Inequality for Schrödinger Operators and Related Topics.
%J Mathematische Zeitschrift
%D 1990
%P 129-152
%V 203
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174118/
%F MZ_1990__203_3_174118