@book{Pohl2006,
  author    = {Johann Emanuel Pohl},
  title     = {Plantarum Brasiliae Icones Et Descriptiones Hactenus Ineditae Iussu Et Auspiciis Francisci Primi, Imperatoris Et Regis Augustissimi ; Bd. 1-2},
  url       = {http://caliban.mpiz-koeln.mpg.de/~stueber/pohl/band1/high/IMG_6403.html},
  year      = {2006},
}