TY  - JOUR
AU  - Andrzej Szulkin
TI  - An example concerning the topological character of the zero-set of a harmonic function.
JO  - Mathematica Scandinavica
PY  - 1978
SP  - 60
EP  - 62
VL  - 43
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1978__43_166602/
ID  - MS2_1978__43_166602
ER  -