Bernard Peng and Andrew Forsberg.
  <b>Directly Rendering Spectral Elements Using Texture Shaders</b>.
  Technical Report CS-02-17, Brown University Computer Science
  Department, August 2002.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Peng-2002-DRS.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/docs/ppt/g/Peng-2002-DRS.ppt.html">(ppt)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Peng-2002-DRS.bib">(bibtex:
  Peng-2002-DRS)</A>.<br />