%0 Journal Article %T Vibration Reduction of Two Degree of Freedom Nonlinear System Subject to Parametric Excitation via Negative Feedback Velocity %A Mai M. Agwa %A Yasser A. Amer %J Asian Research Journal of Mathematics (ISSN: 2456-477X) %D 2019 %R 10.9734/ARJOM/2019/45054 %X Reviewers: %U http://www.sciencedomain.org/abstract/28127