1. Birman, J.S.: Jones' braid-plat formulae, and a new surgery triples. Preprint
2. Brandt, R.D., Lickorish, W.B.R., Millett, K.C.: A polynomial invariant for unoriented knots and links. Invent. Math.84, 563?573 (1986)
3. Burde, G., Zieschang, H.: Knots. De Gruyter Studies in Math., Vol. 5. Berlin, New York: de Gruyter 1985
4. Conway, J.H.: An enumeration of knots and links. Computational problems in abstract algebra. Leech, J. (ed.), pp. 329?358. London: Pergamon Press 1969
5. Grad. Texts in Math.;R.H. Crowell,1977