@book { BilanziereneinesNeubaus,
    title = "Bilanzieren eines Neubaus",
    author = "Thomas {Fleck}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656030935",
    url = "https://www.hausarbeiten.de/document/180365"
}