@book { Ruleoutsinsmallanimalmedicine,
    title = "Rule outs in small animal medicine",
    author = "Prof. Dr. Katrin {Hartmann} and Dr. Gregor {Berg} and Dr. Stefanie {Berg}",
    year = "2019",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/509839"
}