Zeng, Zhuxuan, Wendong Yang, Shengrun Zhang, and Frank Witlox. “Analysing Airport Efficiency in East China Using a Three-Stage Data Envelopment Analysis”. Transport 35, no. 3 (June 25, 2020): 255-272. Accessed November 25, 2024. https://jeelm.vgtu.lt/index.php/Transport/article/view/12869.