TY  - JOUR
AU  - V. I. Bernik
AU  - É. I. Kovalevskaya
TI  - Extremal property of some surfaces in $n$-dimensional Euclidean space
JO  - Matematičeskie zametki
PY  - 1974
SP  - 247
EP  - 254
VL  - 15
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1974_15_2_a9/
LA  - ru
ID  - MZM_1974_15_2_a9
ER  -