@inproceedings{bridges2009:123, author = {Yackel, Carolyn}, title = {Marking a Physical Sphere with a Projected Platonic Solid}, pages = {123--130}, booktitle = {Proceedings of Bridges 2009: Mathematics, Music, Art, Architecture, Culture}, year = {2009}, editor = {Kaplan, Craig S. and Sarhangi, Reza}, isbn = {978-0-96652-020-0}, issn = {1099-6702}, publisher = {Tarquin Publications}, address = {London}, url = {http://archive.bridgesmathart.org/2009/bridges2009-123.html} }