@book { VerfassungsmigkeitderGrundrente,
    title = "Verfassungsmäßigkeit der Grundrente",
    author = "Brigitte {Jährling-Rahnefeld}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093199"
}