@book { FriedenssicherungdurchregionaleOrganisationeninEuropa,
    title = "Friedenssicherung durch regionale Organisationen in Europa",
    author = "Hartmut {Kühne}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086909"
}