@book { DeutschimVergleich,
    title = "Deutsch im Vergleich",
    author = "Marina {Brambilla} and Valentina {Crestani} and Nicolò {Calpestrati}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17598",
    url = "https://www.peterlang.com/document/1111639"
}