@book { KritischeBeurteilungvonOutsourcingEntscheidungen,
    title = "Kritische Beurteilung von Outsourcing-Entscheidungen",
    author = "Thomas {Bonus}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832437695",
    url = "https://m.diplom.de/document/219452"
}