@book { FortgeltungdesZwlftafelrechts,
    title = "Fortgeltung des Zwölftafelrechts",
    author = "Andreas {Flach}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097658"
}