Submitted on: 23 March 2016.
Revised on: 15 April 2016.
Accepted on: 22 May 2016.
___________________INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
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Submitted on: 20 January 2015.
Revised on: 10 March 2015.
Accepted on: 24 April 2015.
___________________INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
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Submitted on: 16 January 2007.
Revised on: 12 February 2007.
Accepted on: 30 March 2007.
___________________INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
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Submitted on: 06 March 2015.
Revised on: 29 May 2015.
Accepted on: 16 July 2015.
___________________INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
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