Submitted on: 01 April 1999.
Revised on: 30 May 1999.
Accepted on: 07 July 1999.
___________________INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
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Submitted on: 16 December 1998.
Revised on: 19 January 1999.
Accepted on: 19 March 1999.
___________________INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
Submitted on: 25 September 1999.
Revised on: 13 November 1999.
Accepted on: 12 December 1999.
___________________INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
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Submitted on: 05 March 2014.
Revised on: 22 April 2014.
Accepted on: 31 May 2014.
___________________INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY