@book { LiteraturzurWendeimDeutschunterricht,
    title = "Literatur zur «Wende» im Deutschunterricht",
    author = "Gunhild {Keuler}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11230",
    url = "https://www.peterlang.com/document/1055357"
}