References

  • Nicholas de Bruijn, Updown generation of Penrose patterns, 1990.
  • Martin Gardner, writing in Scientific American, January 1977.
  • Branko Grünbaum and G. C. Shephard, Tilings and patterns, 1987.
  • Roger Penrose, Pentaplexity, 1978.
  • Roger Penrose, Tilings and quasicrystals: a nonlocal growth problem?, 1989.
  • Daniel Schechtmanet al, Metallic phase with long range orientational order and no translational symmetry, 1984.
  • Marjorie Senechal, Quasicrystals and geometry, 1995.
  • Marjorie Senechal, The Mysterious Mr. Ammann, 2004.
  • U.S. Patent and Trademark Office, search for patent 4,133,152.