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Submitted on: 28 April 2012.
Revised on: 06 June 2012.
Accepted on: 28 July 2012.
___________________GRANA---TAYLOR & FRANCIS AS
Submitted on: 20 May 2021.
Revised on: 09 July 2021.
Accepted on: 27 July 2021.
___________________GRANA---TAYLOR & FRANCIS AS
Submitted on: 12 March 2008.
Revised on: 09 June 2008.
Accepted on: 30 July 2008.
___________________GRANA---TAYLOR & FRANCIS AS
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