TY  - JOUR
AU  - I. E. Gopengauz
TI  - Difference properties and differentiability of functions of several variables
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1973
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1973_28_4_a15/
LA  - ru
ID  - RM_1973_28_4_a15
ER  -