Submitted on: 09 June 2015.
Revised on: 29 August 2015.
Accepted on: 23 October 2015.
___________________AIMS Materials Science---AMER INST MATHEMATICAL SCIENCES-AIMS
Submitted on: 17 January 2019.
Revised on: 15 April 2019.
Accepted on: 10 May 2019.
___________________AIMS Materials Science---AMER INST MATHEMATICAL SCIENCES-AIMS
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Submitted on: 02 February 1998.
Revised on: 28 April 1998.
Accepted on: 07 June 1998.
___________________AIMS Materials Science---AMER INST MATHEMATICAL SCIENCES-AIMS
Submitted on: 04 July 2024.
Revised on: 15 August 2024.
Accepted on: 05 October 2024.
___________________AIMS Materials Science---AMER INST MATHEMATICAL SCIENCES-AIMS
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Submitted on: 30 July 2001.
Revised on: 06 September 2001.
Accepted on: 19 October 2001.
___________________AIMS Materials Science---AMER INST MATHEMATICAL SCIENCES-AIMS
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