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2. Nonlinear flap-lag-axial equations of a rotating beam;Kaza;American Institute of Aeronautics and Astronautics Journal,1977
3. Nonlinear equations of motion for the elastic bending and torsion of twisted nonuniform rotor blades;Hodges;NASA TND-7818,1974
4. Structural dynamics of the heliogyro;MacNeal;NASA CR-1745,1971
5. Foundation of the Nonlinear Theory of Elasticity;Novozhilov,1953