@article{MAN_1979__245_163322,
     author = {Allan L. Edmonds},
     title = {Deformation of {Maps} to {Branched} {Coverings} in {Dimension} {Three.}},
     journal = {Mathematische Annalen},
     pages = {273--279},
     publisher = {mathdoc},
     volume = {245},
     year = {1979},
     zbl = {0406.57003},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__245_163322/}
}