@book { DergrneBaron,
    title = "Der grüne Baron",
    subtitle = "Georg Heinrich von Langsdorff, der Humboldt Brasiliens, und seine Expedition von Rio de Janeiro zum Amazonas 1822-1829",
    author = "Dieter {Strauss}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01472-3",
    url = "https://www.peterlang.com/document/1047104"
}