@book { DieSprachlernklassenimFokus,
    title = "Die Sprachlernklasse(n) im Fokus",
    author = "Gabriele {Blell} and Gabriela {Fellmann} and Stefanie {Fuchs}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11792",
    url = "https://www.peterlang.com/document/1061453"
}