@article{DAN_1984_275_6_a8,
     author = {R. S. Sadyrkhanov},
     title = {A condition for a mapping to be a local homeomorphism},
     journal = {Doklady Akademii Nauk},
     pages = {1316--1320},
     publisher = {mathdoc},
     volume = {275},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_6_a8/}
}