Colin Ware and Glenn Franck.
  <b>Evaluating Stereo and Motion Cues for Visualizing Information
  Nets in Three Dimensions</b>.
  <i>ACM Transactions on Graphics</i>, 15(2):121-140, April 2000.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Ware-2000-ESA.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Ware-2000-ESA.bib">(bibtex:
  Ware-2000-ESA)</A>.<br />