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Submitted on: 07 October 2017.
Revised on: 11 January 2018.
Accepted on: 15 February 2018.
___________________Journal of Applied Nonlinear Dynamics
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Submitted on: 27 October 2011.
Revised on: 26 December 2011.
Accepted on: 13 February 2012.
___________________Journal of Applied Nonlinear Dynamics
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Submitted on: 08 February 2005.
Revised on: 08 May 2005.
Accepted on: 29 June 2005.
___________________Journal of Applied Nonlinear Dynamics
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Submitted on: 15 May 2006.
Revised on: 05 September 2006.
Accepted on: 25 October 2006.
___________________Journal of Applied Nonlinear Dynamics