@book { PerformanceMeasurementinSharedServices,
    title = "Performance Measurement in Shared Services",
    author = "Friedrich {Kalden}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18738",
    url = "https://www.peterlang.com/document/1141761"
}