1. R.B. Taylor, Helicopter Vibration Reduction by Rotor Blade Modal Shaping, 38th Annual Forum of the AHS, USA, 1982
2. P.P. Friedmann, P. Shantakumaran, Optimum Design of Rotor Blades for Vibration Reduction in Forward Flight, Journal of the AHS, Vol. 29, No. 4, pp. 70–80, 1984
3. D.A. Peters, M.P. Rossow, T. Korn, Design of Helicopter Rotor Blades for Optimum Dynamic Characteristics, Computers and Mathematics with Applications, Vol. 12, No. 1, pp. 85–109, 1986
4. M.W. Davis, W.H. Weller, Application of Design Optimization Techniques To Rotor Dynamics Problems, 42nd Annual Forum of the AHS, Washington, DC, USA, 1986
5. J.G. Yen, Coupled Aeroelastic Hub Loads Reduction, AHS/NAI International Seminar, Nanjing, China, 1986