@book { SindSchwiegermtterallegleich,
    title = "Sind Schwiegermütter alle gleich?",
    author = "Andrea {Kettenbach}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01080-0",
    url = "https://www.peterlang.com/document/1044537"
}