TY  - JOUR
AU  - V. I. Ryazanov
TI  - Necessary and sufficient conditions for differentiability in the sense of Belinskii
JO  - Doklady Akademii Nauk
PY  - 1992
SP  - 241
EP  - 244
VL  - 323
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1992_323_2_a10/
LA  - ru
ID  - DAN_1992_323_2_a10
ER  -