@book { OptimaleRechtsformwahl,
    title = "Optimale Rechtsformwahl",
    author = "Kristin {Schad}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832420864",
    url = "https://m.diplom.de/document/217921"
}