TY  - JOUR
AU  - M. E. Tsypkin
TI  - Differential geometry of a ruled space and its applications to the theory of ruled surfaces
JO  - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki
PY  - 1952
SP  - 77
EP  - 99
VL  - 112
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UZKU_1952_112_10_a6/
LA  - ru
ID  - UZKU_1952_112_10_a6
ER  -