To cite package 'paleotree' in publications use:

Bapst DW (2012). paleotree: Paleontological and Phylogenetic Analyses of Evolution.

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

Corresponding BibTeX entry:

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