@book { DierichtigeDiagnoseinderKleintierpraxis,
    title = "Die richtige Diagnose in der Kleintierpraxis",
    author = "Ad {Rijnberk} and Freek J. {van Sluijs}",
    year = "2011",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403592"
}