TY  - JOUR
AU  - S. I. Savel'ev
TI  - Surfaces with plane generatrices along which the tangent plane is constant
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 663
EP  - 665
VL  - 115
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_115_4_a7/
LA  - ru
ID  - DAN_1957_115_4_a7
ER  -