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2. Mechanical Vibrations;Hartog,1985
3. Nonlinear aspects of the performance of centrifugal pendulum vibration absorbers;Newland;J. Eng. Ind.,1964
4. Eliminating crankshaft torsional vibration in radial aircraft engines;Taylor;SAE Trans.,1936
5. Helicopter Vibration Suppression Using Simple Pendulum Absorbers on the Rotor Blade - NASA-CR-169131;Pierce,1982