D. Butler and M. Pendley.
  <b>A Visualization Model Based on the Mathematics of Fiber
  Bundles</b>.
  <i>Computers in Physics</i>, 3(5):45-51, September/October 1989.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Butler-1989-VMB.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Butler-1989-VMB.bib">(bibtex:
  Butler-1989-VMB)</A>.<br />