Chen, Yingwen, Rui Yang, Christina W. Y. Wong, and Xin Miao. “Environmental Performance of China’s Economic System: Integrative Perspective of Efficiency and Productivity”. Technological and Economic Development of Economy 28, no. 3 (April 22, 2022): 743–774. Accessed February 7, 2025. https://mla.vilniustech.lt/index.php/TEDE/article/view/16594.