Reference:
  Author: Thibaut Jombart and François Balloux and Stéphane Dray
  Title: "adephylo: new tools for investigating the phylogenetic signal in biological traits"
  Journal: Bioinformatics
  Year: 2010
  Volume: 26
  Number: 15
  Pages: 1907-1909
  DOI: 10.1093/bioinformatics/btq292
  PMID: 20525823
  URL: http://bioinformatics.oxfordjournals.org/content/26/15/1907
  eprint: http://bioinformatics.oxfordjournals.org/content/26/15/1907.full.pdf+html
