David H. Laidlaw, 2009.
  Unknown
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Paul-2009-HIV.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Paul-2009-HIV.bib">(bibtex:
  Paul-2009-HIV)</A>.<br />