Submitted on: 14 July 2009.
Revised on: 02 September 2009.
Accepted on: 19 September 2009.
___________________JOURNAL OF COMBINATORIAL THEORY SERIES A
Submitted on: 01 December 2010.
Revised on: 18 January 2011.
Accepted on: 08 February 2011.
___________________JOURNAL OF COMBINATORIAL THEORY SERIES A
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Submitted on: 02 June 2021.
Revised on: 27 September 2021.
Accepted on: 09 October 2021.
___________________JOURNAL OF COMBINATORIAL THEORY SERIES A
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Submitted on: 15 March 2016.
Revised on: 01 May 2016.
Accepted on: 16 May 2016.
___________________JOURNAL OF COMBINATORIAL THEORY SERIES A
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