@article{10_4064_fm_158_2_165_180,
     author = {M. A. Mulero},
     title = {Algebraic characterization of finite (branched) coverings},
     journal = {Fundamenta Mathematicae},
     pages = {165--180},
     publisher = {mathdoc},
     volume = {158},
     number = {2},
     year = {1998},
     doi = {10.4064/fm-158-2-165-180},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-158-2-165-180/}
}