TY  - JOUR
AU  - V. A. Startsev
TI  - Symmetric continuity and symmetric differentiability with respect to sets
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 1251
EP  - 1253
VL  - 185
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a12/
LA  - ru
ID  - DAN_1969_185_6_a12
ER  -