References
- R. I. Gamow, Spirals in nature, The Physics Teacher 17 (1979) 14–22.
- William Hoffer, A magic ratio, Orion 4 (1985) 28–39.
- L. Fejes Toth, Regular Figures, Pergamon Press, New York, 1964, pp. 185–189.
- H. Weyl, Symmetry, Princeton University Press, New Jersey, 1982.