TY  - JOUR
AU  - K. K. Golovkin
TI  - Geometric smoothness characteristics of functions of two variables
JO  - Informatics and Automation
PY  - 1964
SP  - 139
EP  - 158
VL  - 73
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1964_73_a4/
LA  - ru
ID  - TRSPY_1964_73_a4
ER  -