@book { ZahnerkrankungendesPferdes,
    title = "Zahnerkrankungen des Pferdes",
    author = "Horst {Keller}",
    year = "2010",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403622"
}