Ronald A. Cohen, 2006.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Ronald-2006-HIV.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Ronald-2006-HIV.bib">(bibtex:
  Ronald-2006-HIV)</A>.<br />