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@article{DAN_1969_188_4_a2, author = {I. V. Dolgachev}, title = {On the purity of the set of singular points of a morphism of schemes}, journal = {Doklady Akademii Nauk}, pages = {742--744}, publisher = {mathdoc}, volume = {188}, number = {4}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_4_a2/} }
I. V. Dolgachev. On the purity of the set of singular points of a morphism of schemes. Doklady Akademii Nauk, Tome 188 (1969) no. 4, pp. 742-744. http://geodesic.mathdoc.fr/item/DAN_1969_188_4_a2/