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@article{MAN_1984__269_163919, author = {Bruce Crauder}, title = {Two {Reduction} {Theorems} for {Threefold} {Birational} {Morphisms.}}, journal = {Mathematische Annalen}, pages = {13--26}, publisher = {mathdoc}, volume = {269}, year = {1984}, zbl = {0546.14004}, url = {http://geodesic.mathdoc.fr/item/MAN_1984__269_163919/} }
Bruce Crauder. Two Reduction Theorems for Threefold Birational Morphisms.. Mathematische Annalen, Tome 269 (1984), pp. 13-26. http://geodesic.mathdoc.fr/item/MAN_1984__269_163919/