@article{DAN_1981_261_3_a5,
     author = {A. D. Mednykh},
     title = {On the solution of the {Hurwitz} problem on the number of nonequivalent coverings over a compact {Riemann} surface},
     journal = {Doklady Akademii Nauk},
     pages = {537--542},
     year = {1981},
     volume = {261},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_3_a5/}
}