Kwan-Liu Ma, Aaron Hertzmann, Victoria Interrante, and Eric B. Lum.
  <b>Recent Advances in Non-Photorealistic Rendering for Art and
  Visualization</b>.
  In <i>SIGGRAPH 2002 Course Notes. Course 23.</i>, August 2002.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Ma-2001-RAN.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Ma-2001-RAN.bib">(bibtex:
  Ma-2001-RAN)</A>.<br />