1. Airport Council International. 2020. Health Guidelines for Passenger Experience at Airport.
2. Airport Milan Bergamo. 2021. “COVID-19 INFO UTILI.” https://www.milanbergamoairport.it/it/covid/.
3. Airport Research Center. 2021. “Cast, Simulation-Software.” https://arc.de/cast-simulation-software/.
4. Andrew C. Lemer. 1987. Special Report - National Research Council, Transportation Research Board Measuring Airport Landside Capacity.
5. Ashford, N.J. & Wright, P.H. 1992. Airport Engineering.