Celebratio Mathematica — Neumann — Complete Bibliography

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W. D. Neumann and L. Reeves: “Regular cocycles and biautomatic structures,” Int. J. Algebra Comput. 6 : 3 (1996), pp. 313–324. MR 1404809 Zbl 0928.20028 ArXiv math/9411203 article

W. D. Neumann and L. Reeves: “Central extensions of word hyperbolic groups,” Ann. Math. (2) 145 : 1 (January 1997), pp. 183–192. MR 1432040 Zbl 0871.20032 ArXiv math/9507201 article