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@article{JRAM_1986__367_152824, author = {Lucian Badescu}, title = {Normal projective degenerations of rational and ruled surfaces.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {76--89}, publisher = {mathdoc}, volume = {367}, year = {1986}, zbl = {0604.14020}, url = {http://geodesic.mathdoc.fr/item/JRAM_1986__367_152824/} }
Lucian Badescu. Normal projective degenerations of rational and ruled surfaces.. Journal für die reine und angewandte Mathematik, Tome 367 (1986), pp. 76-89. http://geodesic.mathdoc.fr/item/JRAM_1986__367_152824/