@book { LeasingnachBaselII,
    title = "Leasing nach Basel II",
    author = "Herbert {Vallon}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832472832",
    url = "https://m.diplom.de/document/222582"
}