@incollection{Ruhlen2006,
  author    = {Merritt Ruhlen},
  title     = {Taxonomic controversies in the twentieth century},
  url       = {http://edoc.bbaw.de/oa/series/reXaIF2DOtIqw/PDF/25nzvtXxXJA_197.pdf},
  year      = {2006},
}