@inproceedings{bridges2022:135,
  author      = {Stampfli, Peter and Schaad, Theo P.},
  title       = {Ptolemy, the Regular Heptagon, and Quasiperiodic Tilings},
  pages       = {135--142},
  booktitle   = {Proceedings of Bridges 2022: Mathematics, Art, Music, Architecture, Culture},
  year        = {2022},
  editor      = {Reimann, David and Norton, Douglas and Torrence, Eve},
  isbn        = {978-1-938664-42-7},
  issn        = {1099-6702},
  publisher   = {Tessellations Publishing},
  address     = {Phoenix, Arizona},

  url         = {http://archive.bridgesmathart.org/2022/bridges2022-135.html}
}