TY  - JOUR
AU  - Durdil, Jiří
TI  - On the geometric characterization of differentiability. II.
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1974
SP  - 727
EP  - 744
VL  - 15
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1974__15_4_a12/
LA  - en
ID  - CMUC_1974__15_4_a12
ER  -