TY  - JOUR
AU  - V. A. Romanov
TI  - Nonequivalence of Various Definitions of Differentiability Directions for Vector Measures
JO  - Matematičeskie zametki
PY  - 2002
SP  - 528
EP  - 534
VL  - 72
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2002_72_4_a5/
LA  - ru
ID  - MZM_2002_72_4_a5
ER  -