@article{IM_1980__59_142728,
     author = {Robert Lazarsfeld and Terence Gaffney},
     title = {On the {Ramification} of {Branched} {Coverings} of {IPn.}},
     journal = {Inventiones mathematicae},
     pages = {53--58},
     publisher = {mathdoc},
     volume = {59},
     year = {1980},
     zbl = {0422.14010},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__59_142728/}
}