@article{DAN_1958_120_3_a10,
     author = {Ya. Shapiro},
     title = {Geodesical direction fields and the group of similitudes in the space of affine connection},
     journal = {Doklady Akademii Nauk},
     pages = {481--484},
     publisher = {mathdoc},
     volume = {120},
     number = {3},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_120_3_a10/}
}