@article{UZKU_1970_129_6_a9,
     author = {A. S. Podkovyrin},
     title = {A certain characteristic property of a~singular surface $x_4$ in the biaffine {space~(MB)}$_6$},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {111--121},
     publisher = {mathdoc},
     volume = {129},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1970_129_6_a9/}
}