TY  - JOUR
AU  - N. V. Efimov
TI  - The impossibility in Euclidean $3$-space of a complete regular surface with a negative upper bound of the Gaussian curvature
JO  - Doklady Akademii Nauk
PY  - 1963
SP  - 1206
EP  - 1209
VL  - 150
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1963_150_6_a4/
LA  - ru
ID  - DAN_1963_150_6_a4
ER  -