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@article{MAN_1981__258_163605, author = {Jonathan M. Wahl}, title = {Derivations of {Negative} {Weight} and {Non-Smoothability} of {Certain} {Singularities.}}, journal = {Mathematische Annalen}, pages = {383--398}, publisher = {mathdoc}, volume = {258}, year = {1981}, zbl = {0507.14029}, url = {http://geodesic.mathdoc.fr/item/MAN_1981__258_163605/} }
Jonathan M. Wahl. Derivations of Negative Weight and Non-Smoothability of Certain Singularities.. Mathematische Annalen, Tome 258 (1981), pp. 383-398. http://geodesic.mathdoc.fr/item/MAN_1981__258_163605/