Bibliography

1

Martin Gardner, ``Flexagons,'' Scientific American, December, 1956, pp. 162-166.

2

Martin Gardner, ``About tetraflexagons and tetraflexigation,'' Scientific American, May, 1958, pp. 122-126.

3

Martin Gardner, Chapter 1: Hexaflexagons (pp. 1 - 14), The Scientific American Book of Mathematical Puzzles & Diversions, Simon and Schuster, New York, 1959 (ISBN 0-671-63652-9 Pbk.).

4

Martin Gardner, Chapter 2: Tetraflexagons (pp. 24 - 31), The $2^{nd}$ Scientific American Book of Mathematical Puzzles & Diversions, Simon and Schuster, New York, 1961; republished The University of Chicago Press, Chicago, 1987 (ISBN 0-226-28253-8(pbk)).

5

Les Pook, Flexagons Inside Out, Cambridge University Press, Cambridge, 2003 (ISBN 0-521-52574-8(pbk)).

14 January 2004