@inproceedings{bridges2012:95,
  author      = {Ming Tomayko and Sandy Spitzer and Linda Cooper
},
  title       = {Escher Unraveled: Using Artwork to Investigate Transformations
},
  pages       = {461--462},
  booktitle   = {Proceedings of Bridges 2012: Mathematics, Music, Art,
                 Architecture, Culture},
  year        = {2012},
  editor      = {Robert Bosch and Douglas McKenna and Reza Sarhangi},
  isbn        = {978-1-938664-00-7},
  issn        = {1099-6702},
  publisher   = {Tessellations Publishing},
  address	  = {Phoenix, Arizona, USA}
}