@article{MZM_1972_12_3_a8,
     author = {A. L. Verner},
     title = {The finiteness of the set of branch points of a spherical mapping of a narrowing saddle surface},
     journal = {Matemati\v{c}eskie zametki},
     pages = {281--286},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_3_a8/}
}