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@article{MAN_1979__241_163260, author = {Bent Fuglede}, title = {Harnack {Sets} and {Openness} of {Harmonie} {Morphisms.}}, journal = {Mathematische Annalen}, pages = {181--186}, publisher = {mathdoc}, volume = {241}, year = {1979}, zbl = {0401.31004}, url = {http://geodesic.mathdoc.fr/item/MAN_1979__241_163260/} }
Bent Fuglede. Harnack Sets and Openness of Harmonie Morphisms.. Mathematische Annalen, Tome 241 (1979), pp. 181-186. http://geodesic.mathdoc.fr/item/MAN_1979__241_163260/