Chris North.
  <b>Toward Measuring Visualization Insight</b>.
  <i>IEEE Computer Graphics and Applications</i>, 26(3):6-9, May-June
  2006.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/North-2006-TMV.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/North-2006-TMV.bib">(bibtex:
  North-2006-TMV)</A>.<br />