1. Brown, R., Gilbert, N.D. and Porter, T., Mathematics and Knots, Public Exhibition, (1989), Brochure (1989), Mathematics and Knots, Bangor, 1997. Web site:
http://www.bangor.ac.uk
/ma/CPM/exhibit
2. Robinson, J., Symbolic Sculpture: catalogue for the exhibition at the Pop Maths Roadshow, Mathematics and Knots, 1989.
3. Brown, R., Quinton, C., Robinson, J., Symbolic Sculpture and Mathematics, Web site:
http://www.bangor.ac.uk
/SculMath
4. Brown, R. and Porter, T., Making a mathematical exhibition, in The popularization of mathematics, edited A.G.Howson and J.-P. Kahane, ICMI Study Series, Cambridge University Press, 1990; 51–64.
5. Deutsch, D., The fabric of reality, Penguin 1997.