Roland Piquepaille.
  <b>Drawing on Air with Haptics in 3D</b>.
  Slashdot.com, September 2007.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Piquepaille-2007-DAH.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Piquepaille-2007-DAH.bib">(bibtex: Piquepaille-2007-DAH)</A>.<br />