1. Helicopter blade slap;Leverton,1966
2. A study of transient noise from helicopter rotor blades;Whatmore,1969
3. Sound radiation from sources in circular motion with application to helicopter rotor noise;Tanna,1970
4. Computer program for the prediction of rotational noise due to fluctuating loading on rotor blades;Tanna;Institute of Sound and Vibration Research Technical Report No. 13,1968
5. Theoretical study of rotational noise;Wright;Institute of Sound and Vibration Research Technical Report No. 14,1969