Jen Grey.
  <b>Daniel Keefe, Cavepainter</b>.
  ACM SIGGRAPH Arts, October 2007.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Grey-2007-DKC.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Grey-2007-DKC.bib">(bibtex:
  Grey-2007-DKC)</A>.<br />