Submitted on: 25 November 2016.
Revised on: 23 December 2016.
Accepted on: 28 January 2017.
___________________CRYSTAL RESEARCH AND TECHNOLOGY
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Submitted on: 13 February 2002.
Revised on: 16 March 2002.
Accepted on: 23 April 2002.
___________________CRYSTAL RESEARCH AND TECHNOLOGY
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Submitted on: 05 January 2019.
Revised on: 22 February 2019.
Accepted on: 25 March 2019.
___________________CRYSTAL RESEARCH AND TECHNOLOGY
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Submitted on: 11 October 2010.
Revised on: 16 December 2010.
Accepted on: 28 January 2011.
___________________CRYSTAL RESEARCH AND TECHNOLOGY
Submitted on: 27 February 2024.
Revised on: 26 June 2024.
Accepted on: 19 July 2024.
___________________CRYSTAL RESEARCH AND TECHNOLOGY