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@article{MAN_1973__200_162361, author = {Dietmar Kahnert}, title = {Graphen reeller {Funktionen.}}, journal = {Mathematische Annalen}, pages = {287--292}, publisher = {mathdoc}, volume = {200}, year = {1973}, zbl = {0234.28012}, url = {http://geodesic.mathdoc.fr/item/MAN_1973__200_162361/} }
Dietmar Kahnert. Graphen reeller Funktionen.. Mathematische Annalen, Tome 200 (1973), pp. 287-292. http://geodesic.mathdoc.fr/item/MAN_1973__200_162361/