@book { DasUnterhaltsbestimmungsrechtderElterngem1612IIBGB,
    title = "Das Unterhaltsbestimmungsrecht der Eltern gemäß § 1612 II BGB",
    author = "Claudia {Schmidt}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095840"
}