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[C1] Coxeter, H. M. S, Regular Polytopes (Third edition), Dover, New York (1993).

[C2] Cromwell, Peter R., Kepler's work on polyhedra, The Mathematical Intelligencer 17, No. 3 (1995), 23 - 33.

[HP1] Hilton, Peter, and Jean Pedersen, Approximating any regular polygon by folding paper; An interplay of geometry, analysis and number theory, Math. Mag. 56 (1983), 141 - 155.

[HP2] Hilton, Peter, and Jean Pedersen, Folding regular star polygons and number theory, Math. Intelligencer 7, No. 1 (1985), 15 - 26.

[HP3] Hilton, Peter, and Jean Pedersen, Geometry in Practice and Numbers in Theory, Monographs in Undergraduate Mathematics 16 (1987), 37 pp. (Available from Dept. of Mathematics, Guilford College, Greensboro, North Carolina 27410).

[HP4] Hilton, Peter, and Jean Pedersen, Geometry: A gateway to understanding, Coll. Math. Journ. 24, No. 4 (1993), 298 - 317.

[HP5] Hilton, Peter, and Jean Pedersen, Build Your Own Polyhedra (Second Printing), Addison-Wesley, Menlo Park, CA, 1994.

[Rec] Hilton, Peter, and Jean Pedersen, Symmetry in Practice - Recreational Constructions.

[N] Newman, J. R, The World of Mathematics, Simon and Schuster, New York (1956), Vol. I, p. 502.

[PP] Pedersen, Jean, and George Pólya, On problems with solutions attainable in more than one way, College Math. J. 15 (1984), 218 - 228

[P1] Pólya, George, Intuitive outline of the solution of a basic combinatorial problem, Switching theory in space technology (ed. H. Aiken and W. F. Main), Stanford University Press (1963), 3 - 7.

[P2] Pólya, George, Mathematical Discovery - On Understanding, Learning, and Problem Solving (Combined Edition), John Wiley and Sons (1981).

[W] Wilde, Carroll, The Contraction Mapping Principle, UMAP Unit 326, Lexington, MA: COMAP, Inc. (1978).