%0 Journal Article
%A Andrzej Szulkin
%T An example concerning the topological character of the zero-set of a harmonic function.
%J Mathematica Scandinavica
%D 1978
%P 60-62
%V 43
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1978__43_166602/
%F MS2_1978__43_166602