Yang, Chih-Ching. “Reduction of Non-Performing Loans in the Banking Industry: An Application of Data Envelopment Analysis”. Journal of Business Economics and Management 18, no. 5 (October 27, 2017): 833–851. Accessed November 26, 2024. https://transport.vgtu.lt/index.php/JBEM/article/view/1244.