Wenjin Zhou, Stephen Correia, and David H. Laidlaw.
 <b>Evaluation of Design Features in Interactive 3D
  Tracts-of-interest Selection Tools in DTI</b>.
 IEEE Visualization 2008 Poster Compendium, 2008.
  <a href="http://vis.cs.brown.edu/docs/pdf/g/Zhou-2008-EDF.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Zhou-2008-EDF.bib">(bibtex:
  Zhou-2008-EDF)</a>.