Adolf Pfefferbaum, Elfar Adalsteinsson, and Eidith V. Sullivan.
  <b>Frontal circuitry degradation marks healthy adult aging:
  Evidence from diffusion tensor imaging</b>.
  <i>NeuroImage</i>, 26:891-899, 2005.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/g/Pfefferbaum-2005-ECD.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Pfefferbaum-2005-ECD.bib">(bibtex: Pfefferbaum-2005-ECD)</A>.<br />