@article{INTA_1965_2_a0,
     author = {G. F. Laptev},
     title = {Differential geometry of many-dimensional surfaces},
     journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya},
     pages = {5--64},
     year = {1965},
     volume = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTA_1965_2_a0/}
}