@book { DasErwerberkonzept,
    title = "Das Erwerberkonzept",
    author = "Falko {Daub}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02935-2",
    url = "https://www.peterlang.com/document/1046973"
}