Submitted on: 26 October 2012.
Revised on: 17 February 2013.
Accepted on: 16 March 2013.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
Submitted on: 28 June 2019.
Revised on: 02 August 2019.
Accepted on: 29 September 2019.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
Submitted on: 19 March 2019.
Revised on: 16 May 2019.
Accepted on: 21 June 2019.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
Submitted on: 16 November 2002.
Revised on: 04 February 2003.
Accepted on: 04 April 2003.
___________________DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL
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