冯爱军. Data Statistics and Development Analysis of Urban Rail Transit in China in 2021（中国城市轨道交通2021年数据统计与发展分析）[J]. 隧道建设, 2022, 42(2): 336-341.

FENG Aijun. Data Statistics and Development Analysis of Urban Rail Transit in China in 2021[J]. Tunnel Construction, 2022, 42(2): 336-341.

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