Huseyin Kocak and David H. Laidlaw.
  <b>Computer Graphics and the Geometry of S3</b>.
  <i>The Mathematical Intelligencer</i>, 9(1):8-10, 1987.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Kocak-1987-CGG.bib">(bibtex:
  Kocak-1987-CGG)</A>.<br />