Ingmar Bitter, Mie Sato, Michael Bender, and Kevin T.
  <b>CEASAR: A smooth, accurate and robust centerline extraction</b>.
  In <i>Proceedings of the conference on Visualization'00</i>, pages
  45-52. IEEE Computer Society Press, 2000.
  published
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Bitter-2000-CAS.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Bitter-2000-CAS.bib">(bibtex:
  Bitter-2000-CAS)</A>.<br />