Books and Articles
• https://johnrausch.com/PuzzleWorld/books/books.htm
• https://johnrausch.com/PuzzleWorld/art/articles.htm
• Ariel Hanaor, "Tensegrity: Theory and Application," in Gabriel, Beyond the Cube, 1997.
• Schoen, and Tom Rodgers, A.K. Peters, 2009, pp. 187-210
• Jerry Slocum and Jack Botermans, Puzzles Old and New, Plenary Publications, 1986
• Early Japanese Export Puzzles 1860s to 1960s by Jerry Slocum and Rik van Grol
Puzzle Designers and Craftsmen
• https://johnrausch.com/PuzzleWorld/des/desncrft.htm
Puzzle Categories and International References
• https://johnrausch.com/PuzzleWorld/cat/category.htm
• https://www.puzzlemuseum.com/index.html
• https://momath.org/mathmonday/
• https://www.puzzlewarehouse.com/history-of-puzzles/
• https://archive.org/details/puzzlesoldnew00hoff/page/n2/mode/1up?q=1
• https://johnrausch.com/PuzzlingWorld/default.htm
• https://johnrausch.com/PuzzleWorld/msc/miscellaneous.htm
• https://web.archive.org/web/20130805045721/http://www.pentangle-puzzles.co.uk/
acatalog/WoodChuck_Puzzles.html
• Nick Baxter, web auction,
http://puzzles.baxterweb.com/
• Indiana University, Slocum Collection,
http://www.indiana.edu/~liblilly/overview/puzzles.shtml
• Mathematica,
http://www.wolfram.com
• https://www.youtube.com/watch?v=o7LmHDQZ4jg
• https://www.youtube.com/watch?v=DpAgmkDTvJU