Lickorish, W. B. Raymond (1997), "Geometry of Alternating Links", An Introduction to Knot Theory, Graduate Texts in Mathematics, vol. 175, Springer-Verlag, New York, pp. 32–40, doi:10.1007/978-1-4612-0691-0_4, ISBN0-387-98254-X, MR1472978; see in particular p. 32
Lickorish, W. B. Raymond (1997), "Geometry of Alternating Links", An Introduction to Knot Theory, Graduate Texts in Mathematics, vol. 175, Springer-Verlag, New York, pp. 32–40, doi:10.1007/978-1-4612-0691-0_4, ISBN0-387-98254-X, MR1472978; see in particular p. 32
doi.org
Lickorish, W. B. Raymond (1997), "Geometry of Alternating Links", An Introduction to Knot Theory, Graduate Texts in Mathematics, vol. 175, Springer-Verlag, New York, pp. 32–40, doi:10.1007/978-1-4612-0691-0_4, ISBN0-387-98254-X, MR1472978; see in particular p. 32