@book { SprachlicheVariationimDeutschen,
    title = "Sprachliche Variation im Deutschen",
    author = "Jutta {Ransmayr} and Elena {Vasylchenko}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b13270",
    url = "https://www.peterlang.com/document/1056777"
}