@book { KhewrdenMargarinekaufen,
    title = "Kühe würden Margarine kaufen",
    author = "Sven-David {Müller}",
    year = "2015",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403910"
}