TY  - JOUR
AU  - K. Sh. Ramazanova
TI  - The classification of two-dimensional surfaces in $E_4$ according to type of congruences of ideal lines of the first and second kind
JO  - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki
PY  - 1966
SP  - 41
EP  - 49
VL  - 126
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/UZKU_1966_126_1_a4/
LA  - ru
ID  - UZKU_1966_126_1_a4
ER  -