@book { EinfhrungindieRechtsgeschichteOsteuropas,
    title = "Einführung in die Rechtsgeschichte Osteuropas",
    author = "Herbert {Küpper}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099817"
}