@inproceedings{bridges2007:21, author = {Frederickson, Greg N.}, title = {Symmetry and Structure in Twist-Hinged Dissections of Polygonal Rings and Polygonal Anti-Rings}, pages = {21--28}, booktitle = {Bridges Donostia: Mathematics, Music, Art, Architecture, Culture}, year = {2007}, editor = {Sarhangi, Reza and Barrallo, Javier}, isbn = {0-9665201-8-1}, issn = {1099-6702}, publisher = {Tarquin Publications}, address = {London}, url = {http://archive.bridgesmathart.org/2007/bridges2007-21.html} }