@book{Wallace2006,
  author    = {Alfred Russel Wallace},
  title     = {The Malay Archipelago, the land of the orang-utan and the bird of paradise : a narrative of travel with studies of man and nature},
  url       = {http://caliban.mpiz-koeln.mpg.de/~stueber/wallace/malay/index.html},
  year      = {2006},
}