TY  - JOUR
AU  - S. P. Ponomarev
TI  - Symmetrically differentiable functions with a perfect set of nondifferentiability points
JO  - Matematičeskie zametki
PY  - 1985
SP  - 80
EP  - 88
VL  - 38
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1985_38_1_a9/
LA  - ru
ID  - MZM_1985_38_1_a9
ER  -