@book { DieKapitulariengesetzgebungLotharsIinItalien,
    title = "Die Kapitulariengesetzgebung Lothars I. in Italien",
    author = "Mathias {Geiselhart}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093556"
}