@book { EnforcementvonIAS,
    title = "Enforcement von IAS",
    subtitle = "Eine vergleichende Analyse unterschiedlicher Lösungsansätze",
    author = "Sebastian {Jäger}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832462550",
    url = "https://m.diplom.de/document/221475"
}