W.J. Murphy.
  <b>Resolution of the early placental mammal radiation using
  Bayesian phylogenetics</b>.
  <i>Science</i>, 294(5550):2348-2351, 2001.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Murphy-2001-REP.bib">(bibtex:
  Murphy-2001-REP)</A>.<br />