@inproceedings{bridges2010:44,
  author      = {Ma. Louise Antonette N. De Las Pe\~{n}as, Eden Delight B. Provido and Ren\'{e} P. Felix},
  title       = {On Torsion Free Subgroups of $p32$ and Related Colored Tilings},
  pages       = {383--386},
  booktitle   = {Proceedings of Bridges 2010: Mathematics, Music, Art,
                 Architecture, Culture},
  year        = {2010},
  editor      = {George W. Hart and Reza Sarhangi},
  isbn        = {978-0-98460-420-3},
  issn        = {1099-6702},
  publisher   = {Tessellations Publishing}
}