Yeh, Li-Ting, and Dong-Shang Chang. “Using Categorical DEA to Assess the Effect of Subsidy Policies and Technological Learning on R&D Efficiency of It Industry”. Technological and Economic Development of Economy 26, no. 2 (February 3, 2020): 311-330. Accessed November 22, 2024. https://bme.vgtu.lt/index.php/TEDE/article/view/11411.