M.S. Landy and J.A. Movshon.
  <i><b>Computational Models of Visual Processing</b></i>.
  MIT Press, Cambridge, MA, 1991.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Landy-1991-CMV.bib">(bibtex:
  Landy-1991-CMV)</A>.<br />