1. On the radiation of sound from an unflanged circular pipe;LEVIN;Physics Review,1948
2. D. L. LANSING, J. A. DRISCHLER, C. G. PUSEY, 1970, 79th Spring Meeting, Acoustical Society of America, Atlantic City, NJ, Paper
3. Radiation of cylindrical duct acoustics modes with flow mismatch;SAVKAR;Journal of Sound and Vibration,1975
4. Refraction of acoustic duct waveguide modes by exhaust Jets;MANI;Quarterly of Applied Mathematics,1973
5. W. EVERSMAN, 1991, NASA Reference Publication 1258, 2, 101, Theoretical models for duct acoustic propagation and radiation