@book { AmerikanischeHerausforderungen,
    title = "Amerikanische Herausforderungen",
    author = "Corinna {Ludwig}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06807-8",
    url = "https://www.peterlang.com/document/1050148"
}