References billcutlerpuzzles.com

1. Botermanns, Jack and Pieter Van Delft, Creative Puzzles of the World, Harry Abrams Publishing, 1978
2. Coffin, Stewart, Puzzle Craft, 1985.
3. Cross, C. Arthur, The Chinese Cross Puzzle, Pentangle, 1979.
4. Cutler, Bill, ``The Six-Piece Burr,'' Journal of Recreational Mathematics, pp. 241-250, Vol. 10 (4), 1977-78.
5. Cutler, Bill, computer output from analysis of the general, solid case (unpublished).
6. Dewdney, A. K., ``Computer Recreations,'' Scientific American, pp. 16-27, October, 1985.
7. Filipiak, A. S., 100 Puzzles, A. S. Barnes and Co., pp. 79-87, 1942.
8. Gardner, Martin, ``Mathematical Games,'' Scientific American, pp. 14-26, January, 1978.
9. Slocum, Jerry, and Jack Botermans, Puzzles Old \& New, University of Washington Press, 1986.
10. Wyatt, E. M., Puzzles in Wood, The Bruce Publishing Co., 1928, reprinted by Woodcraft Supply Corp., 1980.

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