David H. Laidlaw.
  <b>Computer Graphics Tools for Understanding Tensor-Valued
  Volume Data: A Painting Metaphor</b>.
  Unpublished
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Laidlaw-1996-CGT.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Laidlaw-1996-CGT.bib">(bibtex:
  Laidlaw-1996-CGT)</A>, September 1996.<br />