H. Theisel and H.-P. Seidel.
  <b>Feature Flow Fields</b>.
  In <i>Joint EUROGRAPHICS&mdash;IEEE TCVG Symposium on Visualization</i>,
  2003.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Theisel-2003-FFF.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Theisel-2003-FFF.bib">(bibtex:
  Theisel-2003-FFF)</A>.<br />