@book { ImmobilienLeasing,
    title = "Immobilien-Leasing",
    subtitle = "Wesen, Objekte und Leasing-Vertrags-Modelle",
    author = "Thomas {Pohl}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832417321",
    url = "https://m.diplom.de/document/217601"
}