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Submitted on: 15 June 2008.
Revised on: 16 August 2008.
Accepted on: 28 August 2008.
___________________COMPTES RENDUS CHIMIE---ACAD SCIENCES
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Submitted on: 06 June 2008.
Revised on: 05 September 2008.
Accepted on: 16 October 2008.
___________________COMPTES RENDUS CHIMIE---ACAD SCIENCES
Submitted on: 30 July 2005.
Revised on: 30 October 2005.
Accepted on: 12 November 2005.
___________________COMPTES RENDUS CHIMIE---ACAD SCIENCES
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Submitted on: 02 February 2011.
Revised on: 07 April 2011.
Accepted on: 06 May 2011.
___________________COMPTES RENDUS CHIMIE---ACAD SCIENCES