@article{GDZPPN00206667X, title = {The non-vanishing of the deviations of a local ring.}, journal = {Commentarii mathematici Helvetici}, volume = {62}, year = {1987}, pages = {646-653}, zbl = {0639.13011}, url = {http://dml.mathdoc.fr/item/GDZPPN00206667X} }
Halperin, Stephen. The non-vanishing of the deviations of a local ring.. Commentarii mathematici Helvetici, Tome 62 (1987) pp. 646-653. http://gdmltest.u-ga.fr/item/GDZPPN00206667X/