Three vector generation of crystal space groups in geometric algebra
 @Article{hitzer06bssf,
  author = 	 {E.M.S. Hitzer and C. Perwass},
  title = 	 {Three vector generation of crystal space groups in Geometric Algebra},
  journal = 	 {Bulletin of the Society for Science on Form},
  year = 	 2006,
  volume =	 1,
  number =	 21,
  pages =	 {55-56}
}