@book { MehrsprachigkeitSprachkontaktundBildungsbiografie,
    title = "Mehrsprachigkeit, Sprachkontakt und Bildungsbiografie",
    author = "Beatrix {Kreß} and Vasco {Silva} and Ioulia {Grigorieva}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14559",
    url = "https://www.peterlang.com/document/1055581"
}