A comment on a Nonideal Centrifugal vibrator Machine Behavior with Soft and Hard Springs. - Márcio José Horta Dantas; José Manoel Balthazar (Int. J. Bifurc. Chaos, 2006)

On a Nonideal (MRD) Damper-Electro-mechanical Absorber Dynamics. - Jorge Luis Palacios Felix; José Manoel Balthazar; Márcio José Horta Dantas (Int. J. Bifurc. Chaos, 2011)