@book { KompendiumderGeflgelkrankheiten,
    title = "Kompendium der Geflügelkrankheiten",
    author = "Otfried {Siegmann} and Ulrich {Neumann}",
    year = "2014",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403885"
}