@book { PerformanceMeasurement,
    title = "Performance Measurement",
    author = "Torben {Printz}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836611619",
    url = "https://m.diplom.de/document/225700"
}