Submitted on: 14 October 2016.
Revised on: 10 February 2017.
Accepted on: 04 April 2017.
___________________International Journal of Number Theory
Submitted on: 25 August 2009.
Revised on: 14 December 2009.
Accepted on: 08 January 2010.
___________________International Journal of Number Theory
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Submitted on: 29 November 2011.
Revised on: 17 March 2012.
Accepted on: 10 April 2012.
___________________International Journal of Number Theory
Submitted on: 12 April 2007.
Revised on: 03 May 2007.
Accepted on: 09 June 2007.
___________________International Journal of Number Theory
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Submitted on: 24 November 2019.
Revised on: 11 February 2020.
Accepted on: 26 March 2020.
___________________International Journal of Number Theory
Submitted on: 20 October 2014.
Revised on: 02 December 2014.
Accepted on: 03 January 2015.
___________________International Journal of Number Theory
Submitted on: 16 June 2016.
Revised on: 20 September 2016.
Accepted on: 31 October 2016.
___________________International Journal of Number Theory