Song Zhang and David H. Laidlaw.
  <b>A Model for some Subcortical DTI Planar and Linear
  Anisotropy</b>.
  MICCAI 2004, September 2004.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Zhang-2004-MSS.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Zhang-2004-MSS.bib">(bibtex:
  Zhang-2004-MSS)</A>.<br />