Özçelik, Funda, and Burcu Avcı Öztürk. “(Relative Efficiency Analysis With Data Envelopment Analysis Models Using Costs As Input)”. Journal of Business Research - Turk 11, no. 2 (June 13, 2021): 1011–1028. Accessed July 17, 2024. https://isarder.org/index.php/isarder/article/view/812.