@book { PenetrationundTransformationinFranzsischWestafrika,
    title = "Penetration und Transformation in Französisch-Westafrika",
    author = "Wolfgang {Mayer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1070114"
}