Schwarz, G. 1978. Estimating the dimension of a model. Ann. Stat. 6:461–465. Semple, C., and M. Steel. 2003. Phylogenetics. Oxford University Press, Oxford. Sober, E. 1988. Reconstructing the past—Parsimony, evolution, and inference. MIT Press, Cambridge, Massachusetts. Sober, E. 2002. Reconstructing ancestral character states—A likelihood perspective on cladistic parsimony. The Monist 85:156– ...