MathSciNet bibliographic data MR1437046 13D40 (13A02) Avramov, Luchezar L.; Buchweitz, Ragnar-Olaf; Sally, Judith D. Laurent coefficients and ${\rm Ext}$${\rm Ext}$ of finite graded modules. Math. Ann. 307 (1997), no. 3, 401–415. Article

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