@book { DerBrsengangderSiemensAGindenUSA,
    title = "Der Börsengang der Siemens AG in den USA",
    author = "Oliver {Wolschon}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832443337",
    url = "https://m.diplom.de/document/219933"
}