@book { DierechtshistorischeEntwicklungderAdoption,
    title = "Die rechtshistorische Entwicklung der Adoption",
    author = "Christoph {Neukirchen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099831"
}