Submitted on: 26 February 2005.
Revised on: 05 April 2005.
Accepted on: 20 May 2005.
___________________FERROELECTRICS---TAYLOR & FRANCIS LTD
Submitted on: 12 April 2010.
Revised on: 12 May 2010.
Accepted on: 24 May 2010.
___________________FERROELECTRICS---TAYLOR & FRANCIS LTD
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