REFERENCES
- Anderson , M. P. 1974 . Exactness Properties of Profinite Completion Functors . Topology. , 13 : 229 – 239 .
- Birman , J. S. 1975 . “ Braids, Links, and Mapping Class Groups ” . In Ann. Math. Studies Princeton University Press .
- Nakamura , H. 1994 . Galois Rigidity of Pure Sphere Braid Groups and Profinite Calculus . J. Math. Sci. Univ. Tokyo , 1 : 71 – 136 .