Submitted on: 26 May 2013.
Revised on: 10 August 2013.
Accepted on: 19 September 2013.
___________________ANNALES DE L INSTITUT HENRI POINCARE-ANALYSE NON LINEAIRE
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Submitted on: 21 July 2008.
Revised on: 26 October 2008.
Accepted on: 24 November 2008.
___________________ANNALES DE L INSTITUT HENRI POINCARE-ANALYSE NON LINEAIRE
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Submitted on: 01 January 2025.
Revised on: 01 April 2025.
Accepted on: 11 April 2025.
___________________ANNALES DE L INSTITUT HENRI POINCARE-ANALYSE NON LINEAIRE