@book { ExecutiveInformationSystemsEISalsControllingInstrument,
    title = "Executive Information Systems (EIS) als Controlling-Instrument",
    author = "Ulrich {Weißmann}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832411671",
    url = "https://m.diplom.de/document/217090"
}