M. E. Brummer, R. M. Mersereau, R. L. Eisner, and R. J. R.
  <b>Automatic detection of brain contours in MRI data sets </b>.
  <i>IEEE Transactions on Medical Imaging</i>, 12(2):153-166, June
  1993.
  published
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Brummer-1993-ADO.bib">(bibtex:
  Brummer-1993-ADO)</A>.<br />