Cagatay Demiralp, Song Zhang, David Tate, Stephen Correia, and David H.
  Laidlaw.
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  volumes using perceptual flat-torus coloring and edge rendering</b>.
  In <i>Proceedings of Eurographics</i>, 2006.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Demiralp-2006-CSV.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Demiralp-2006-CSV.bib">(bibtex:
  Demiralp-2006-CSV)</A>.<br />