@book { PrivatautonomieundInhaltskontrolleprivatrechtlicherAGB,
    title = "Privatautonomie und Inhaltskontrolle privatrechtlicher AGB",
    author = "Siegfried {Schwab}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640747788",
    url = "https://www.hausarbeiten.de/document/160802"
}