@book { AlternativeRisikofinanzierungberKapitalmrkte,
    title = "Alternative Risikofinanzierung über Kapitalmärkte",
    author = "Spes-Alexa {von Hagen}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832481780",
    url = "https://m.diplom.de/document/223399"
}