@book { Sprachkontaktforschung,
    title = "Sprachkontaktforschung",
    author = "Mehmet {Metin}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01654-3",
    url = "https://www.peterlang.com/document/1045901"
}