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Submitted on: 26 December 2000.
Revised on: 13 February 2001.
Accepted on: 03 April 2001.
___________________Journal of Applied Nonlinear Dynamics
Submitted on: 20 June 2016.
Revised on: 05 September 2016.
Accepted on: 22 October 2016.
___________________Journal of Applied Nonlinear Dynamics
Submitted on: 10 April 2009.
Revised on: 14 May 2009.
Accepted on: 24 June 2009.
___________________Journal of Applied Nonlinear Dynamics
Submitted on: 24 January 2022.
Revised on: 04 May 2022.
Accepted on: 28 June 2022.
___________________Journal of Applied Nonlinear Dynamics