@book { ActaGermanica,
    title = "Acta Germanica",
    author = "Walter G. {Köppe} and  {Germanistenverband im südl. Afrika}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093785"
}