1. Recent studies of rotorcraft blade-vortex interaction noise;Preisser;J. Aircr.,1994
2. Schlieren and noise studies of rotors in forward flight;Tangler,1977
3. Rotor blade–vortex interaction noise;Yung;Prog. Aerosp. Sci.,2000
4. Sound generation by turbulence and surfaces in arbitrary motion;Ffowcs Williams;Philos. Trans. R. Soc. A, Math. Phys. Eng. Sci.,1969
5. Aeroacoustics;Goldstein,1976