@book { PermanentOutsidersinChina,
    title = "Permanent Outsiders in China",
    author = "Yang {Liu}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/b16826",
    url = "https://www.peterlang.com/document/1059055"
}