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Submitted on: 24 April 1999.
Revised on: 25 June 1999.
Accepted on: 15 August 1999.
___________________Journal of Applied Nonlinear Dynamics
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Submitted on: 07 December 2024.
Revised on: 12 February 2025.
Accepted on: 07 March 2025.
___________________Journal of Applied Nonlinear Dynamics
Submitted on: 21 June 2003.
Revised on: 09 September 2003.
Accepted on: 01 November 2003.
___________________Journal of Applied Nonlinear Dynamics
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