Xie Tian, Yang Wen, Guo Ting, Bai Zhipeng, and Tang Jiayi. 2018. “Study on the Characteristics of Unorganized Emission of Volatile Organic Compounds in Chemical Industry--Taking Tianjin Chemical Enterprises As an Example”. Thematics Journal of Geography 7 (11). https://www.thinkindiaquarterly.org/index.php/tjg/article/view/8221.