Daniel Acevedo.
  <b>Visual Elements Language</b>.
  <A HREF="http://vis.cs.brown.edu/docs/html/g/Acevedo-2002-VEL.html.html">(html)</A>
  <A HREF="http://vis.cs.brown.edu/docs/txt/g/Acevedo-2002-VEL.txt.html">(txt)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Acevedo-2002-VEL.bib">(bibtex:
  Acevedo-2002-VEL)</A>.<br />