Chujan, W., L. B. N. Nguyen, A. S. Faizi, and . J. Huang. “Labour-Use Efficiency in China: A Stochastic Frontier Analysis”. INTERNATIONAL JOURNAL OF CHINA STUDIES, Dec. 2025, pp. 37-64, https://ejournal.um.edu.my/index.php/IJCS/article/view/67424.