@book { SchleichendeIslamisierung,
    title = "Schleichende Islamisierung?",
    author = "Michael {Többens}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05448-4",
    url = "https://www.peterlang.com/document/1049325"
}