Bibliography

1

Richard Courant and Herbert Robbins, What is Mathematics? Oxford University Press, 1941 with subsequent printings.

2

W. W. Rouse Ball, Mathematical Recreations and Essays (revised by H. Coxeter), Macmillan, 1960.

Books, Articles, and Written Material

3

Margaret Joseph, ``Hexahexaflexagrams,'' Mathematics Teacher, 44 247-248 (1951).

4

W. R. Ransom, ``A Six-Sided Hexagon,'' School Science and Mathematics 52 94. (1952)

5

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

6

Joan Crampin, ``Note 2672,'' Mathematical Gazette, 41 55-56. (1957). [February]

7

Scientific American, ``Letters,'' March, 1957, pp. 8-9.

8

C. O. Oakley and R. J. Wisner, ``Flexagons,'' American Mathematical Monthly, 64 l43-154 (1957).

9

Martin Gardner, ``About tetraflexagons and tetraflexigation,'' Scientific American, May, 1958, pp. 122-6.

10

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.).

11

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).

12

P. B. Chapman, ``Square Flexagons,'' Mathematical Gazette 45 192-194 (1961).

13

Martin Gardner, Chapter 7: The Combinatorics of Paper Folding (pp. 60 - 73), Wheels, Life, and Other Mathematical Amusements, W. H. Freeman and Company, New York, 1983 (ISBN 0-7167-1589-9 Pbk.).

14

F. G. Maunsell, ``The Flexagon and the Hexahexaflexagram,'' (Note 2449), Mathematical Gazette, 38 213-214 (1954).

15

Harold V. McIntosh, ``Flexagons,'' Unpublished paper.

16

Alan Phillips, ``Hexaflexagons,'' Mimeographed.

17

Mike Schlessinger, ``Tuckerman Tree Theory,'' Unpublished paper.

18

R. F. Wheeler, ``The Flexagon Family,'' Mathematical Gazette, 42 1-6 (Feb., 1958).

19

A. S. Conrad, ``The Flexagon,'' RIAS Miscellaneous Report, Baltimore, Maryland, 1960. (later renamed ``The Theory of the Flexagon,'' RIAS Technical Report 60-24, 1960).

20

Anthony S. Conrad and Daniel K. Hartline, Flexagons, RIAS Technical Report 62-11 Baltimore, Maryland, 1962.

21

Joseph S. Madachy, Chapter 3: ``Fun with Paper,'' Madachy's Mathematical Recreations, Dover Publications, Inc, New York, (1979). Originally published as Mathermatics on Vacation, Charles Scribner's Sons, New York (1966).

22

T. Bruce McLean, ``V-Flexing the HexaHexaFlexagon,'' American Mathematical Monthly, 86 457-466 (1979).

23

Eric Kenneway, Complete Origami, St. Martin's Press, New York, 1987. (ISBN 0-312-00898-8(pbk)) pp. 57-62.

24

Peter Hilton, Jean Pedersen, and Hans Walser, ``The Faces of the Tri-Hexaflexagon,'' Mathematics Magazine, 70 243-251 (1997).

25

David Mitchell, The Magic of Flexagons, Tarquin Publications, Norfolke, England, 1998. (ISBN 1-899618-28-7)

26

Robert E. Neale, ``Self-Designing Tetraflexagons,'' in Elwyn Berlekamp and Tom Rodgers (editors), The Mathemagician and Pied Puzzler, pages 117-126, A. K. Peters, Ltd., Natick, Massachussetts (1999).

27

H. Steinhaus, Mathematical Snapshots, Dover Publications, Inc, Mineola, New York, 1999. (ISBN 0-486-40914-7) pp. 171-181. (Reprint of an earlier Oxford edition, one of a series of reprints dating from 1950, the earlier of which do not include include the flexatube.)

Patents

28

B. M. Stalker, ``Advertising Medium or Toy,'' U.S. Patent No. 1,997,022.

29

N. F. Rutherford, ``Toy'', U.S. Patent No. 2,245,875.

30

A. H. Shemet, ``Changeable Display Amusement Device,'' U.S. Patent No. 2,688,820.

31

R. E. Rogers et. al., ``Changeable Amusement Devices and the Like,'' U.S. Patent No. 2,883,195.

32

Iris Sarid, ``Foldable Structure,'' U.S. Patent No. 3,962,816 (June 15, 1976).

33

Stewart Lamlee, ``Method of making a hexaflexagon,'' U.S. Patent No. 4,240,858 (December 23, 1980).

34

Douglas A. Engel, ``Puzzle amusement device,'' U.S. Patent No. 4,735,418 (April 5, 1988).