@book { SituativeWirkungenvonStockOptionPlnen,
    title = "Situative Wirkungen von Stock-Option-Plänen",
    author = "Oliver {Raulff}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832470746",
    url = "https://m.diplom.de/document/222393"
}