Submitted on: 03 August 2012.
Revised on: 13 November 2012.
Accepted on: 08 December 2012.
___________________Condensed Matter---MDPI
Submitted on: 03 April 2012.
Revised on: 22 July 2012.
Accepted on: 13 August 2012.
___________________Condensed Matter---MDPI
Submitted on: 23 September 2021.
Revised on: 01 January 2022.
Accepted on: 22 February 2022.
___________________Condensed Matter---MDPI
Submitted on: 28 October 2002.
Revised on: 06 February 2003.
Accepted on: 26 February 2003.
___________________Condensed Matter---MDPI
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