@book { DeutscherBundundeuropischeFriedensordnung,
    title = "Deutscher Bund und europäische Friedensordnung",
    author = "Christian {Steinmetz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093829"
}