1. The theory of the dynamic vibration absorber;Ormondroyd;Trans. ASME,1928
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3. Non-linear vibrations treated by the averaging method of ritz;Klotter,1952
4. Steady, forced vibration of unsymmetrical piecewise-linear system;Maezawa;Bull. J.S.M.E.,1961
5. On the stability of the impact damper;Masri;J. appl. Mech.,1966