Donald H. House, Alethea S. Bair, and Colin Ware.
  <b>An Approach to the Perceptual Optimization of Complex
  Visualizations</b>.
  <i>IEEE Transactions on Visualization and Computer Graphics</i>,
  12(4):509-521, July/August 2006.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/House-2006-APO.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/House-2006-APO.bib">(bibtex:
  House-2006-APO)</A>.<br />