Michael J. Bey, Roger Zauel, Stephanie K. Brock, and Scott Tashman.
  <b>Validation of a New Model-Based Tracking Technique for
  Measuring Three-Dimensional, In-Vivo Glenohumeral Joint Kinematics</b>.
  <i>Journal of Biomechanical Engineering</i>, 128:604-609, August
  2006.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Bey-2006-VNM.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Bey-2006-VNM.bib">(bibtex:
  Bey-2006-VNM)</A>.<br />