Space group visualizer for monoclinic space groups
 @Article{perwass06bssf,
  author = 	 {C. Perwass and E.M.S. Hitzer},
  title = 	 {Space group visualizer for monoclinic space groups},
  journal = 	 {Bulletin of the Society for Science on Form},
  year = 	 2006,
  volume =	 1,
  number =	 21,
  pages =	 {38-39}
}