@book { LeasingoderKaufProundContra,
    title = "Leasing oder Kauf? Pro und Contra",
    author = "Veselina {Milanova}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640298808",
    url = "https://www.hausarbeiten.de/document/124781"
}