@article{INTG_1974_6_a7,
     author = {P. I. Shveikin},
     title = {Application of normal objects to the geometry of a~surface in a~projective space},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {157--170},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1974_6_a7/}
}