1. S.A. Bleiler, Knots Prime on Many Strings, preprint, to appear in TAMS.
2. J.H. Conway, An Enumeration of Knots and Links, Computational Problems in Abstract Algebra, Pergamon Press, Oxford and New York, 1969, 329–358.
3. R.H. Fox, A Quick Trip Through Knot Theory, Topology of 3-Manifolds and Related Topics, (Proc., The University of Georgia Institute, 1961), Prentice-Hall, Englewoods Cliffs, New Jersey, 1962, 120–167.
4. C. McA. Gordon, Problems in Knot Theory, Proceedings Plans-sur-Bex, 1977, LNM vol. 685, Springer-Verlag, Berlin and New York, 1978, 309–311.
5. C. McA. Gordon and R.A. Litherland, Incompressible Planar Surfaces in 3-Manifolds, preprint.