U. Burgel, T. Schormann, A. Schleicher, and K. Zilles.
  <b>Mapping of Histologically Identified Long Fiber Tracts in
  Human Cerebral Hemispheres to the MRI Volume of a Reference Brain: Position
  and Spatial Variability of the Optic Radiation</b>.
  <i>NeuroImage</i>, 10:489-499, 1999.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Burgel-1999-MHI.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Burgel-1999-MHI.bib">(bibtex:
  Burgel-1999-MHI)</A>.<br />