@book { UmgangsrechtausFrauensicht,
    title = "Umgangsrecht aus Frauensicht",
    author = "Christina {Aman}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836643764",
    url = "https://m.diplom.de/document/227653"
}