@book { LuhmannsBegriffderWeltgesellschaft,
    title = "Luhmanns Begriff der Weltgesellschaft",
    author = "Oliver {Wennmann}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638567510",
    url = "https://www.hausarbeiten.de/document/63796"
}