Celebratio Mathematica

Joan S. Birman

The Birman–Hilden theory

Works connected to David Robert John Chillingworth

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J. S. Birman and D. R. J. Chilling­worth: “On the homeotopy group of a non-ori­ent­able sur­face,” Proc. Camb. Philos. Soc. 71 : 3 (May 1972), pp. 437–​448. An er­rat­um to this art­icle was pub­lished in Math. Proc. Camb. Philos. Soc. 136:2 (2004). MR 0300288 Zbl 0232.​57001 article