@book { MigrationundRitualtransfer,
    title = "Migration und Ritualtransfer",
    author = "Robert {Langer} and Raoul {Motika} and Michael {Ursinus}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099087"
}