@book { DerRoteAdlerorden,
    title = "Der Rote Adlerorden",
    subtitle = "Entstehung und rechtliche Grundlagen (1705-1918)",
    author = "Felix {Lehmann}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093107"
}