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Durdil, Jiří. On the geometric characterization of differentiability. II. Commentationes Mathematicae Universitatis Carolinae, Tome 15 (1974) no. 4, pp. 727-744. http://geodesic.mathdoc.fr/item/CMUC_1974_15_4_a12/
@article{CMUC_1974_15_4_a12,
author = {Durdil, Ji\v{r}{\'\i}},
title = {On the geometric characterization of differentiability. {II}},
journal = {Commentationes Mathematicae Universitatis Carolinae},
pages = {727--744},
year = {1974},
volume = {15},
number = {4},
mrnumber = {0426019},
zbl = {0294.58003},
language = {en},
url = {http://geodesic.mathdoc.fr/item/CMUC_1974_15_4_a12/}
}
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