@book { DiplomaticRecognitionofDividedNations,
    title = "Diplomatic Recognition of Divided Nations",
    subtitle = "China, Germany, Korea, and Vietnam",
    author = "Yongyi {Tao}",
    year = "2022",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b19796",
    url = "https://www.peterlang.com/document/1251758"
}