Jerek K. Jones.
  <b>Determining and Visualizing Uncertainty in Estimates of Fiber
  Orientation From Diffusion Tensor MRI</b>.
  <i>Magnetic Resonance in Medicine</i>, 49:7-12, 2003.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Jones-2003-DVN.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Jones-2003-DVN.bib">(bibtex:
  Jones-2003-DVN)</A>.<br />