@book { DasStiefkindimUnterhaltsrecht,
    title = "Das Stiefkind im Unterhaltsrecht",
    author = "Sebastian {Kremer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1089540"
}