@book { UntersuchungderBerufungspraxisinEheverfahren,
    title = "Untersuchung der Berufungspraxis in Eheverfahren ",
    author = "Stefan {Lippert}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17061",
    url = "https://www.peterlang.com/document/1059025"
}