1. Jack, E., and Kurtz, D. W. "A Review of Aerodynamic Noise From Propellers, Rotors, and Lift Fans," Tech. Rep. NASA-CR107568, Pasedena, California, 1970.
2. Brooks, T. F., Pope, D. S., and Marcolini, M. A. "Airfoil Self-noise and Prediction," Tech. Rep. NASA-RP-1218, Hampton, Virginia, 1989.
3. Reduction of Wind Turbine Noise Using Optimized Airfoils and Trailing-Edge Serrations