@book { ZurAmbivalenzvonKarriereanreizen,
    title = "Zur Ambivalenz von Karriereanreizen",
    author = "Frank {Hefner}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832436339",
    url = "https://m.diplom.de/document/219285"
}