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@article{MAN_1957__133_160534, author = {H. Lenz}, title = {Axiomatische {Bemerkung} zur {Polarentheorie.}}, journal = {Mathematische Annalen}, pages = {39--40}, publisher = {mathdoc}, volume = {133}, year = {1957}, zbl = {0077.13804}, url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160534/} }
H. Lenz. Axiomatische Bemerkung zur Polarentheorie.. Mathematische Annalen, Tome 133 (1957), pp. 39-40. http://geodesic.mathdoc.fr/item/MAN_1957__133_160534/