@book { DeutschundseineNachbarn,
    title = "Deutsch und seine Nachbarn",
    author = "Michael {Elmentaler}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01948-3",
    url = "https://www.peterlang.com/document/1054106"
}