@misc{10_1017_S2040618500034316,
     title = {A {Note} on {Regular} {Coverings} of {Closed} {Orientable} {Surfaces}},
     journal = {Glasgow mathematical journal},
     pages = {49--66},
     year = {1961},
     volume = {5},
     number = {2},
     doi = {10.1017/S2040618500034316},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034316/}
}