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@article{CMH_1987__62_140104, author = {Stephen Halperin}, title = {The non-vanishing of the deviations of a local ring.}, journal = {Commentarii mathematici Helvetici}, pages = {646--653}, publisher = {mathdoc}, volume = {62}, year = {1987}, zbl = {0639.13011}, url = {http://geodesic.mathdoc.fr/item/CMH_1987__62_140104/} }
Stephen Halperin. The non-vanishing of the deviations of a local ring.. Commentarii mathematici Helvetici, Tome 62 (1987), pp. 646-653. http://geodesic.mathdoc.fr/item/CMH_1987__62_140104/