@book { AndrGideundderKommunismus,
    title = "André Gide und der Kommunismus",
    author = "Martin {Völkner}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836639101",
    url = "https://m.diplom.de/document/227411"
}