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Submitted on: 17 October 2015.
Revised on: 31 January 2016.
Accepted on: 29 February 2016.
___________________Computational and Theoretical Chemistry
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Submitted on: 19 August 2000.
Revised on: 10 September 2000.
Accepted on: 21 October 2000.
___________________Computational and Theoretical Chemistry
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Submitted on: 08 April 2002.
Revised on: 12 June 2002.
Accepted on: 17 July 2002.
___________________Computational and Theoretical Chemistry