@book{Scheuchzer2006,
  author    = {Johann Scheuchzer},
  title     = {Operis agrostographici idea : Seu graminum, juncorum, cyperorum, Cyperoidum, iisque affinium methodus},
  url       = {http://caliban.mpiz-koeln.mpg.de/~stueber/scheuchzer1/index.html},
  year      = {2006},
}