Submitted on: 12 November 2014.
Revised on: 03 February 2015.
Accepted on: 17 March 2015.
___________________CHEMICAL PHYSICS LETTERS---ELSEVIER
Submitted on: 10 October 2018.
Revised on: 29 November 2018.
Accepted on: 17 January 2019.
___________________CHEMICAL PHYSICS LETTERS---ELSEVIER
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Submitted on: 07 August 2000.
Revised on: 27 September 2000.
Accepted on: 02 November 2000.
___________________CHEMICAL PHYSICS LETTERS---ELSEVIER
Submitted on: 03 May 2016.
Revised on: 18 July 2016.
Accepted on: 01 September 2016.
___________________CHEMICAL PHYSICS LETTERS---ELSEVIER
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Submitted on: 02 November 2014.
Revised on: 08 January 2015.
Accepted on: 27 February 2015.
___________________CHEMICAL PHYSICS LETTERS---ELSEVIER