MathSciNet bibliographic data MR774711 (86e:57005) 57M25 (57N10) Fickle, Henry Clay Knots, ${\bf Z}$${\bf Z}$-homology $3$$3$-spheres and contractible $4$$4$-manifolds. Houston J. Math. 10 (1984), no. 4, 467–493. Journal

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