1. Recommended Method for Computing Noise Contours Around Airports. ICAO Doc 9911, 2008.

2. Report on Standard Method of Computing Noise Contours around Civil Airports. ECAC.CEAC Doc 29. 3rd Edition. 2005.

3. Idar L N Granøien, et al. Comparison of INM profiles and measured flight profiles at Gardermoen, SINTEF Report STF40 A02032, 2002.