1. Airport Cooperative Research Program (2011), “Passenger level of service and spatial planning for airport terminals”, available at: http://onlinepubs.trb.org/onlinepubs/acrp/acrp_rpt_055.pdf (accessed 4 August 2014).
2. Airports Council International (2007), “Simplifying passenger travel (SPT) programme”, available at: www.aci.aero (accessed 9 July 2014).
3. Airports Council International (2008), “ASQ survey: benchmarking the global airport industry”, available at: http://aci-na.org/static/entransit/ASQ_Brochure2008.pdf (accessed 31 May 2014).
4. Airports Council International (2014), “Airports council international (ACI) world report 2014”, available at: www.aci.aero (accessed 8 July 2014).