1. Ahmad, J. & Saxena, R. (2015). Managing severe airspace flow programs: The airline side of the problem. AGIFORS Airline Operations Study Group Meeting, Brisbane.
2. Ana Publishing Inc. (2017). NAIA alternative pushed with the volume of Philippines air traffic increasing rapidly. The Market Monitor. https://marketmonitor.com.ph/naia-alternative-pushed-volume-philippines-air-traffic
3. Artaya, K. & Altus, S. (2011). Quantitative problem-solving methods in the airline industry. Springer.
4. Baker, J., & Baker, J. (2019, February 25). Acknowledging the human factor in air traffic control. Airport Technology. https://www.airport-technology.com/features/human-factor-air-traffic-control
5. Baker, J., & Baker, J. (2018, July 11). The role of automation in air traffic control. Airport Technology. https://www.airport-technology.com/features/automation-air-traffic-control