@article{UZKU_1966_126_1_a4,
     author = {K. Sh. Ramazanova},
     title = {The classification of two-dimensional surfaces in $E_4$ according to type of congruences of ideal lines of the first and second kind},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {41--49},
     year = {1966},
     volume = {126},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1966_126_1_a4/}
}