@book { FensterzurWelt,
    title = "Fenster zur Welt",
    author = "Johann {Wendel}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04607-6",
    url = "https://www.peterlang.com/document/1048476"
}