@book { RealEstateTaxinChina,
    title = "Real Estate Tax in China",
    author = "Tomasz {Wilczak}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656029670",
    url = "https://m.hausarbeiten.de/document/180219"
}