@book { ErfolgoderKriseamNeuenMarkt,
    title = "Erfolg oder Krise am Neuen Markt",
    author = "Frank {Dudda}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832447168",
    url = "https://m.diplom.de/document/220319"
}