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Measurement and evaluation of green development efficiency of tourism transportation industry based on the DEA-Malmquist index model: A case of Lanzhou City
LIU Danqi, YANG Ali, GU Youqian
Arid Land Geography . 2025, (11): 2062 -2071 .  DOI: 10.12118/j.issn.1000-6060.2024.553