PDF(6654 KB)
Study of the development efficiency of coal enterprises based on the three-stage DEA-Malmquist model
LU Hongqi, SHAO Shizhe, ZHANG Xiaomin, CHEN Xiujuan, LIU Yanwei
PDF(6654 KB)
PDF(6654 KB)
Study of the development efficiency of coal enterprises based on the three-stage DEA-Malmquist model
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