@book { GatekeeperforschungEinkurzerberblick,
    title = "Gatekeeperforschung - Ein kurzer Überblick",
    author = "Stephanie {Grüner}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638537315",
    url = "https://www.hausarbeiten.de/document/59934"
}