G. Elisabeta Marai, David H. Laidlaw, Cagatay Demiralp, Stuart Andrews, Cindy
  Grimm, and Joseph J. Crisco.
  <b>Estimating joint contact areas and ligament lengths from bone
  kinematics and surfaces</b>.
  <i>IEEE Transactions on Biomedical Engineering</i>, 51(5):790-799,
  May 2003.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Marai-2003-EJC.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Marai-2003-EJC.bib">(bibtex:
  Marai-2003-EJC)</A>.<br />