Submitted on: 29 June 2013.
Revised on: 05 September 2013.
Accepted on: 20 October 2013.
___________________Advances in Continuous and Discrete Models
Submitted on: 19 November 2023.
Revised on: 21 December 2023.
Accepted on: 16 January 2024.
___________________Advances in Continuous and Discrete Models
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Submitted on: 04 September 2015.
Revised on: 04 December 2015.
Accepted on: 18 January 2016.
___________________Advances in Continuous and Discrete Models
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http://reply.papertrans.cn/1/8/721/721-26.png
Submitted on: 11 September 1998.
Revised on: 30 November 1998.
Accepted on: 19 January 1999.
___________________Advances in Continuous and Discrete Models
Submitted on: 10 September 2022.
Revised on: 30 November 2022.
Accepted on: 31 December 2022.
___________________Advances in Continuous and Discrete Models
Submitted on: 03 July 2001.
Revised on: 06 September 2001.
Accepted on: 15 October 2001.
___________________Advances in Continuous and Discrete Models
Submitted on: 13 March 2012.
Revised on: 09 July 2012.
Accepted on: 01 August 2012.
___________________Advances in Continuous and Discrete Models