@book { RuleOutsfrdieKleintiermedizin,
    title = "Rule-Outs für die Kleintiermedizin",
    author = "Katrin {Hartmann}",
    year = "2021",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/936158"
}