A numerical approach to phylogenetic systemetics. Farris, J., Kluge, A., & Eckhardt, M. Syst Zool, 19:172–189, 1970.  bibtex   @Article{farris70numerical,
  author    = {Farris, J.S. and Kluge, A.G. and Eckhardt, M.J.},
  title     = {A numerical approach to phylogenetic systemetics},
  journal   = {Syst Zool},
  year      = {1970},
  volume    = {19},
  pages     = {172--189},
  keywords  = {phylogenetics},
  owner     = {Standard},
  timestamp = {2006.12.01},
} 
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