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@article{CM_1980__40_2_167_0, author = {Sally, Judith D.}, title = {Tangent cones at {Gorenstein} singularities}, journal = {Compositio Mathematica}, pages = {167--175}, publisher = {Sijthoff et Noordhoff International Publishers}, volume = {40}, number = {2}, year = {1980}, mrnumber = {563540}, zbl = {0389.13009}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1980__40_2_167_0/} }
Sally, Judith D. Tangent cones at Gorenstein singularities. Compositio Mathematica, Tome 40 (1980) no. 2, pp. 167-175. http://geodesic.mathdoc.fr/item/CM_1980__40_2_167_0/