@inproceedings{bridges2012:154,
  author      = {Helaman Ferguson and Claire Ferguson
},
  title       = {Celebrating Mathematics in Stone and Bronze: <em>Umbilic Torus NC vs SC</em>
},
  pages       = {17--24},
  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}
}