Submitted on: 07 November 2022.
Revised on: 13 February 2023.
Accepted on: 02 April 2023.
___________________Facta Universitatis-Series Mathematics and Informatics
Submitted on: 21 October 2019.
Revised on: 02 December 2019.
Accepted on: 13 December 2019.
___________________Facta Universitatis-Series Mathematics and Informatics
Submitted on: 03 September 2014.
Revised on: 03 November 2014.
Accepted on: 18 December 2014.
___________________Facta Universitatis-Series Mathematics and Informatics
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Submitted on: 05 April 2023.
Revised on: 17 July 2023.
Accepted on: 08 August 2023.
___________________Facta Universitatis-Series Mathematics and Informatics
Submitted on: 01 July 2013.
Revised on: 28 July 2013.
Accepted on: 10 September 2013.
___________________Facta Universitatis-Series Mathematics and Informatics
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Submitted on: 06 August 2015.
Revised on: 10 October 2015.
Accepted on: 18 November 2015.
___________________Facta Universitatis-Series Mathematics and Informatics
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