@book { Arthrosenatrlichbehandeln,
    title = "Arthrose natürlich behandeln",
    author = "Gabriela {Schwarz}",
    year = "2016",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403941"
}