Liu, Jianfen, and Shengpu Li. “Research on the Ranking of University Education Based on Grey-TOPSIS-DEA Method”. International Journal of Emerging Technologies in Learning (iJET) 10, no. 8 (December 14, 2015): pp. 51–54. Accessed November 23, 2024. https://online-journals.org/index.php/i-jet/article/view/5279.