J.A. Skene and Sharon Swartz.
  <b>The mechanical and energetic role of the wing membrane in bat
  flight</b>.
  Unpublished
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Skene-2004-MER.bib">(bibtex:
  Skene-2004-MER)</A>, 2004.<br />