@book { IntegrationexternerInformationenineinDataWarehousezurUntersttzungdesManagements,
    title = "Integration externer Informationen in ein Data Warehouse zur Unterstützung des Managements",
    author = "Holger {Walther}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832440169",
    url = "https://m.diplom.de/document/219651"
}