@book { IslamundDiaspora,
    title = "Islam und Diaspora",
    author = "Rauf {Ceylan}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01855-4",
    url = "https://www.peterlang.com/document/1046919"
}