@book { RechtsethischePrinzipiendesnachehelichenUnterhalts,
    title = "Rechtsethische Prinzipien des nachehelichen Unterhalts",
    author = "Bernhard {Metz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098409"
}