McConway, K. J. and Sims, H. J. (2004) A likelihood-based method for
testing for nonstochastic variation of diversification rates in
phylogenies. \emph{Evolution}, \bold{58}, 12--23.
+
+ Paradis, E. (2012) Shift in diversification in sister-clade
+ comparisons: a more powerful test. \emph{Evolution}, \bold{66},
+ 288--295.
}
\author{Emmanuel Paradis}
\seealso{