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Level measurement and influencing factors of the obstacle to factor flow in the Chengdu-Chongqing Economic Circle
ZHANG Yang, CHEN Yu-lu, WANG Xing-ping, GONG Jie, JI Meng-rong, ZHAO Jing-jing
JOURNAL OF NATURAL RESOURCES . 2024, (4): 897 -911 .  DOI: 10.31497/zrzyxb.20240409