Submitted on: 29 March 2012.
Revised on: 12 May 2012.
Accepted on: 11 June 2012.
___________________Communications in Combinatorics and Optimization
Submitted on: 29 December 2016.
Revised on: 31 January 2017.
Accepted on: 05 March 2017.
___________________Communications in Combinatorics and Optimization
Submitted on: 16 January 2025.
Revised on: 06 February 2025.
Accepted on: 10 March 2025.
___________________Communications in Combinatorics and Optimization
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Submitted on: 14 August 2018.
Revised on: 22 October 2018.
Accepted on: 21 November 2018.
___________________Communications in Combinatorics and Optimization
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