@book { SozialeSicherunginSubsaharaAfrika,
    title = "Soziale Sicherung in Subsahara-Afrika",
    author = "Claudia {Maas}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640258680",
    url = "https://www.hausarbeiten.de/document/121802"
}