@article{DAN_1967_173_4_a6,
     author = {V. D. Izmailov},
     title = {Invariant equipment of a surface in a space with an affine connection},
     journal = {Doklady Akademii Nauk},
     pages = {755--757},
     publisher = {mathdoc},
     volume = {173},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_4_a6/}
}