@book { BenchmarkingfrindustrielleDienstleistungen,
    title = "Benchmarking für industrielle Dienstleistungen",
    author = "Arndt {Werding}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832444068",
    url = "https://m.diplom.de/document/220014"
}