1. Hardin, J.C. "Airframe Self-Noise - Four Years of Research", TMX-73908, NASA (1976)
2. Heller. H.H. and Dobrzvnski. W.M. "A Comprehensive Review of Airframe Noise Research", ICAS Paper GL-03 (1978)
3. International Standard, Is 0 3891, "Acoustics - Procedure for Describing Aircraft Noise Heard on the Ground".
4. Revell, J.D. "Induced Drag Effect on Airframe Noise", AIAA Paper 75-487 (1975)