MathSciNet bibliographic data MR380790 55E45 Miller, Haynes R.; Ravenel, Douglas C.; Wilson, W. Stephen Novikov's ${\rm Ext}\sp{2}$${\rm Ext}\sp{2}$ and the nontriviality of the gamma family. Bull. Amer. Math. Soc. 81 (1975), no. 6, 1073–1075. Article

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