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Evaluation of reactive nitrogen emissions reduction in Beijing-Tianjin-Hebei agglomeration based on ‘N offset’ mechanism and data envelopment analysis
XIAN Chao-fan, WANG Li-yan, LU Fei, ZHENG Hua, OUYANG Zhi-yun
Chinese Journal of Applied Ecology . 2017, (8): 2545 -2553 .  DOI: 10.13287/j.1001-9332.201708.020