%0 Journal Article %A Robert Lazarsfeld %A Terence Gaffney %T On the Ramification of Branched Coverings of IPn. %J Inventiones mathematicae %D 1980 %P 53-58 %V 59 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__59_142728/ %F IM_1980__59_142728