@article{IVM_1984_9_a17,
     author = {Ya. L. Shapiro and V. A. Igoshin},
     title = {Singular points of a~geodesic field},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {79--81},
     publisher = {mathdoc},
     number = {9},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1984_9_a17/}
}