1. Note: Mayday, Mayday, Mayday! Responding to environmental shocks: Insights on global airlines' responses to COVID-19;J Amankwah-Amoah;Transportation Research Part E: Logistics and Transportation Review,2003
2. Cruise ports: a strategic nexus between regions and global lines-evidence from the Mediterranean;L Gui;Maritime Policy & Management,2011
3. Government subsidies for preventing supply disruption when the supplier has an outside option under competition;Y Guo;Transportation Research Part E: Logistics and Transportation Review,2021
4. Analysis of the US cruise line industry;J P Hobson;Tourism management,1993