@book { IstdieWallStreetnochzuretten,
    title = "Ist die Wall Street noch zu retten?",
    author = "Matthias {Graf}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Germany",
    doi = "10.3239/9783836629539",
    url = "https://m.diplom.de/document/226785"
}