Submitted on: 13 July 2021.
Revised on: 19 September 2021.
Accepted on: 07 October 2021.
___________________APPLIED MATHEMATICAL MODELLING
Submitted on: 03 January 2020.
Revised on: 23 April 2020.
Accepted on: 15 May 2020.
___________________APPLIED MATHEMATICAL MODELLING
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Submitted on: 27 July 2000.
Revised on: 05 September 2000.
Accepted on: 28 September 2000.
___________________APPLIED MATHEMATICAL MODELLING
Submitted on: 01 August 2004.
Revised on: 25 September 2004.
Accepted on: 10 November 2004.
___________________APPLIED MATHEMATICAL MODELLING
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Submitted on: 05 February 2020.
Revised on: 09 March 2020.
Accepted on: 06 April 2020.
___________________APPLIED MATHEMATICAL MODELLING
Submitted on: 21 February 2018.
Revised on: 28 April 2018.
Accepted on: 04 June 2018.
___________________APPLIED MATHEMATICAL MODELLING