Submitted on: 26 June 2002.
Revised on: 05 October 2002.
Accepted on: 12 November 2002.
___________________Applicable Analysis and Discrete Mathematics
Submitted on: 25 August 2020.
Revised on: 08 November 2020.
Accepted on: 25 November 2020.
___________________Applicable Analysis and Discrete Mathematics
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Submitted on: 28 December 2023.
Revised on: 09 February 2024.
Accepted on: 18 March 2024.
___________________Applicable Analysis and Discrete Mathematics
Submitted on: 09 September 2014.
Revised on: 18 December 2014.
Accepted on: 13 February 2015.
___________________Applicable Analysis and Discrete Mathematics
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