TY  - JOUR
AU  - N. M. Isakov
TI  - A global property of approximately differentiable functions
JO  - Matematičeskie zametki
PY  - 1987
SP  - 500
EP  - 508
VL  - 41
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1987_41_4_a6/
LA  - ru
ID  - MZM_1987_41_4_a6
ER  -