1. Port state control at European union under pandemic outbreak;Akyurek;Eur. Transp. Res. Rev.,2020
2. Ports, maritime transport, and industry: The immediate impact of COVID-19 and the way forward;Alamoush;Marit. Technol. Res.,2022
3. Identifying port congestion and evaluating its impact on maritime logistics;Bai;Marit. Policy Manag.,2022
4. Quantifying the impact of pandemic lockdown policies on global port calls;Bai;Transp. Res. A,2022
5. Pearson correlation coefficient;Benesty,2009