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Impact of different control policies for COVID-19 outbreak on the air transportation industry: A comparison between China, the U.S. and Singapore
- Fanyu Meng,
- Wenwu Gong,
- Jun Liang,
- Xian Li,
- Yiping Zeng,
- Lili Yang
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- Published: March 16, 2021
- https://doi.org/10.1371/journal.pone.0248361