Submitted on: 14 May 2021.
Revised on: 11 June 2021.
Accepted on: 03 August 2021.
___________________Advances in Continuous and Discrete Models
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Submitted on: 01 July 2024.
Revised on: 08 August 2024.
Accepted on: 28 August 2024.
___________________Advances in Continuous and Discrete Models
Submitted on: 19 December 2010.
Revised on: 02 April 2011.
Accepted on: 14 April 2011.
___________________Advances in Continuous and Discrete Models
Submitted on: 18 February 2015.
Revised on: 20 March 2015.
Accepted on: 16 May 2015.
___________________Advances in Continuous and Discrete Models
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Submitted on: 17 April 2006.
Revised on: 30 May 2006.
Accepted on: 20 June 2006.
___________________Advances in Continuous and Discrete Models
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