@inproceedings{bridges2010:43,
  author      = {Liu, Yang and Toussaint, Godfried},
  title       = {Types of Repetition and Multistable Perception in the Frieze Patterns on the Marble Pavement of the Cathedral of Siena},
  pages       = {43--50},
  booktitle   = {Proceedings of Bridges 2010: Mathematics, Music, Art, Architecture, Culture},
  year        = {2010},
  editor      = {Hart, George W. and Sarhangi, Reza},
  isbn        = {978-0-98460-420-3},
  issn        = {1099-6702},
  publisher   = {Tessellations Publishing},
  address     = {Phoenix, Arizona},

  url         = {http://archive.bridgesmathart.org/2010/bridges2010-43.html}
}