@book { GrundzgedesGesellschaftsrechts,
    title = "Grundzüge des Gesellschaftsrechts",
    author = "Eugen {Klunzinger}",
    year = "2012",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1220819"
}