To cite package 'paleotree' in publications use:

Bapst, David W. (2012). paleotree: an R package for paleontological and phylogenetic analyses of evolution. Methods Ecol. Evol. 3: 803-807. <doi:10.1111/j.2041-210X.2012.00223.x>

As paleotree is continually evolving, you may want to cite its version number. Find it with 'help(package=paleotree)'.

Corresponding BibTeX entry:

    title = {paleotree: Paleontological and Phylogenetic Analyses of
    author = {David W. Bapst},
    year = {2012},