@article{IVM_1963_3_a24,
     author = {Ya. L. Shapiro},
     title = {Some systems of paths contained in a {Riemannian} space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {166--172},
     publisher = {mathdoc},
     number = {3},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1963_3_a24/}
}