@article{JATRS-225FA3D62802E847,
 title={{Impact of the COVID-19 Pandemic on Multi-airport Systems Worldwide}},
 author={Xiangru Wu and Xiaowen Fu and Zheng Lei and Kun Wang},
 journal={{Journal of the Air Transport Research Society}},
 volume={1},
 number={1},
 pages={117-135},
 pages={https://dx.doi.org/10.59521/225FA3D62802E847},
 year={2023},
 publisher={ATRS}
}