1. Welch J. D. , Andrews J. W. , Martin B. D. and Sridhar B. (2007). Macroscopic workload model for estimating en route sector capacity. 7th USA/Europe Air Traffic Management R&D Seminar.
2. Human Factors Measurement for Future Air Traffic Control Systems
3. Met Office (2014). WAFC London Performance Indicators. http://www.metoffice.gov.uk/aviation/responsibilities/icao.
4. Boeing (2001). Air Traffic Management Revolutionary Concepts That Enable Air Traffic Growth While Cutting Delays.
5. Reynolds T. G. and Hansman R. J. (2003). Investigating Conformance Monitoring Issues in Air Traffic Control Using Fault Detection Approaches. Massachusetts Institute of Technology, Report No. ICAT-2003-5.