@book { ActaGermanica,
    title = "Acta Germanica",
    author = "Cilliers {van den Berg}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17901",
    url = "https://www.peterlang.com/document/1111615"
}