Dodecaflexagons

Updated 5 April 2009.

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12-gon-21

For more information see SCHWARTZ A and RUTZKY J. The hexa-dodeca-flexagon. In PEGG E, SCHOEN A H and RODGERS T. Homage to a pied puzzler. Wellesley, Massachusetts: A K Peters, 2009, pp. 257-268.