@book { Schiller,
    title = "Schiller",
    author = "Wolfgang {Wittkowski} and Stephanie {Kufner}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01718-2",
    url = "https://www.peterlang.com/document/1047024"
}