@inproceedings{bridges2012:17, author = {Ferguson, Helaman and Ferguson, Claire}, title = {Celebrating Mathematics in Stone and Bronze: {\em Umbilic Torus NC vs SC}}, pages = {17--24}, booktitle = {Proceedings of Bridges 2012: Mathematics, Music, Art, Architecture, Culture}, year = {2012}, editor = {Bosch, Robert and McKenna, Douglas and Sarhangi, Reza}, isbn = {978-1-938664-00-7}, issn = {1099-6702}, publisher = {Tessellations Publishing}, address = {Phoenix, Arizona}, url = {http://archive.bridgesmathart.org/2012/bridges2012-17.html} }