MathSciNet bibliographic data MR1052871 13D02 (13D05) Goto, Shiro; Suzuki, Naoyoshi What makes ${\rm Tor}\sp R\sb 1(R/I,I)$${\rm Tor}\sp R\sb 1(R/I,I)$ free? Proc. Amer. Math. Soc. 112 (1991), no. 3, 605–611. Article

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