@book { RestaurantFinancialPlan,
    title = "Restaurant Financial Plan",
    author = "Christoph {Müller}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656334118",
    url = "https://www.hausarbeiten.de/document/200591"
}