Submitted on: 02 December 2010.
Revised on: 30 January 2011.
Accepted on: 24 March 2011.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
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Submitted on: 12 December 2018.
Revised on: 20 March 2019.
Accepted on: 30 April 2019.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
Submitted on: 02 April 2007.
Revised on: 19 June 2007.
Accepted on: 10 July 2007.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
Submitted on: 26 November 2017.
Revised on: 22 February 2018.
Accepted on: 17 March 2018.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL