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@article{10_4064_cm_15_2_303_306, author = {W. Wojty\'nski}, title = {A property of differentiable functions}, journal = {Colloquium Mathematicum}, pages = {303--306}, publisher = {mathdoc}, volume = {15}, number = {2}, year = {1966}, doi = {10.4064/cm-15-2-303-306}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-15-2-303-306/} }
W. Wojtyński. A property of differentiable functions. Colloquium Mathematicum, Tome 15 (1966) no. 2, pp. 303-306. doi : 10.4064/cm-15-2-303-306. http://geodesic.mathdoc.fr/articles/10.4064/cm-15-2-303-306/
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