Kosara and Robert.
  <b>Symmetric Bat Flight</b>, July 2008.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Kosara-2008-SBF.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Kosara-2008-SBF.bib">(bibtex:
  Kosara-2008-SBF)</A>.<br />