REFERENCES
- Alexander H. Frey, Jr., and David Singmaster, Handbook of Cubik Math, Enslow Publishers, Hillside, NJ, 1982.
- H. J. Kamack and T. R. Keane, The Rubik tesseract, unpublished manuscript.
- Ernö Rubik et al., Rubik's Cubic Compendium, Oxford University Press, Fair Lawn, NJ, 1987.