1. L. GUTIN, 1948, NACA TM 1195, On the sound field of a rotating propeller, Zhurnal Tekhnicheskoi Fiziki, 12
2. The sound field for singularities in motion;LOWSON;Proceedings of the Royal Society of London,1965
3. W. ERNSTHAUSEN, 1936, Luftfahrtforschung, 13, The source of propeller noise, NACA TM, 1937
4. A. F. DEMING, 1937, NACA TN, Noise from propellers with symmetrical sections at zero blade angle, I and II
5. Sound generation by turbulence and surfaces in arbitrary motion;FFOWCS WILLIAMS;Philosophical Transactions of the Royal Society of London,1969