Chunlei Liu, Roland Bammer, Burak Acar, and Michael E. Moseley.
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  <i>Magnetic Resonance in Medicine</i>, 51:924-937, 2004.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Liu-2004-CND.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Liu-2004-CND.bib">(bibtex:
  Liu-2004-CND)</A>.<br />