@book { Realoptionen,
    title = "Realoptionen",
    subtitle = "Strategische Investitionsplanung und -bewertung auf Basis von Optionspreismodellen",
    author = "Andreas {Emmert}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832447991",
    url = "https://m.diplom.de/document/220386"
}