Timothy Urness, Victoria Interrante, Ivan Marusic, Ellen Longmire, and
  Bharathram Ganapathisubramani.
  <b>Effectively Visualizing Multi-Valued Flow Data using Color
  and Texture</b>.
  In <i>Proceedings of IEEE Visualization</i>, October 2003.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Urness-2003-EVM.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Urness-2003-EVM.bib">(bibtex:
  Urness-2003-EVM)</A>.<br />