@book { ImperiumetComitatus,
    title = "«Imperium et Comitatus»",
    author = "Peter {Nitschke} and Mark {Feuerle}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106962"
}