TY  - JOUR
AU  - R. R. Mullari
TI  - On the principle directions of an $m$-dimensional surface
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 989
EP  - 992
VL  - 144
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a11/
LA  - ru
ID  - DAN_1962_144_5_a11
ER  -