1. The vibrations of a spinning disk;Lamb,1921
2. On the free transverse vibrations of a uniform circular disk clamped at its center and on the effect of rotation;Southwell,1922
3. Theory of self excited mechanical oscillations of helicopter rotors with highed blades;Coleman;NACA Report,1958
4. A simplified approach to helicopter ground resonance;Done;Aeronautical Journal,1974
5. Vibration characteristics of bladed disk assemblies;Ewins;Journal Mechanical Engineering Science,1973