@book { RckoderFortwirkungimPrivatrecht,
    title = "Rück- oder Fortwirkung im Privatrecht",
    author = "Michael {Daemgen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099837"
}