Maribel Yasmina Santos and Luis Alfredo Amaral.
  <b>Mining geo-referenced data with qualitative spatial reasoning
  strategies</b>.
  <i>Computers and Graphics</i>, 28(3):371-379, June 2004.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Santos-2004-MGD.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Santos-2004-MGD.bib">(bibtex:
  Santos-2004-MGD)</A>.<br />