@book { InvestororientierteBusinessplneZusammenstellungeinerToolbox,
    title = "Investororientierte Businesspläne: Zusammenstellung einer Toolbox",
    author = "Anne-Kathrin {Fleck}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842837539",
    url = "https://m.diplom.de/document/229289"
}