@book { DerAufrufAndieKulturwelt,
    title = "Der Aufruf «An die Kulturwelt!»",
    author = "Jürgen von {Ungern-Sternberg} and Wolfgang von {Ungern-Sternberg}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03286-4",
    url = "https://www.peterlang.com/document/1047560"
}