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Submitted on: 07 April 2019.
Revised on: 18 May 2019.
Accepted on: 02 June 2019.
SOLID STATE SCIENCES
Submitted on: 30 March 2007.
Revised on: 17 April 2007.
Accepted on: 04 May 2007.
SOLID STATE SCIENCES---ELSEVIER
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Submitted on: 26 February 2008.
Revised on: 10 March 2008.
Accepted on: 19 March 2008.
SOLID STATE SCIENCES---ELSEVIER