1. Helicopter engine protection;Stallard;Perfusion,1997
2. AGARD. Engine–airframe integration for rotorcraft. Technical report LS-148, AGARD, Neuilly sur Seine; 1986.
3. Practical intake aerodynamics;Seddon,1999
4. Calcaterra J. Experimental and numerical simulation of FOD. RTO-TR-AVT-094, NATO-RTO; 2004 [chapter 3].
5. Life prediction of helicopter engines fitted with dust filters;van der Walt;J Aircraft,1995