@book { WerzeugtfrdenZeugen,
    title = "Wer zeugt für den Zeugen?",
    author = "Dorothee {Gelhard} and Irmela von der {Lühe}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02256-8",
    url = "https://www.peterlang.com/document/1045867"
}