@article{IM_1974__26_142300,
     author = {Fumio Sakai},
     title = {Degeneracy of {Holomorphic} {Maps} with {Ramification.}},
     journal = {Inventiones mathematicae},
     pages = {213--230},
     year = {1974},
     volume = {26},
     zbl = {0276.32012},
     url = {http://geodesic.mathdoc.fr/item/IM_1974__26_142300/}
}