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Submitted on: 31 December 2018.
Revised on: 23 April 2019.
Accepted on: 17 May 2019.
___________________Journal of Spectroscopy---HINDAWI LTD
Submitted on: 18 October 2017.
Revised on: 23 November 2017.
Accepted on: 20 December 2017.
___________________Journal of Spectroscopy---HINDAWI LTD
Submitted on: 26 February 2000.
Revised on: 15 June 2000.
Accepted on: 24 July 2000.
___________________Journal of Spectroscopy---HINDAWI LTD
Submitted on: 28 April 2003.
Revised on: 24 July 2003.
Accepted on: 20 August 2003.
___________________Journal of Spectroscopy---HINDAWI LTD
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Submitted on: 09 January 2008.
Revised on: 14 March 2008.
Accepted on: 02 May 2008.
___________________Journal of Spectroscopy---HINDAWI LTD
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Submitted on: 06 September 2004.
Revised on: 23 November 2004.
Accepted on: 06 January 2005.
___________________Journal of Spectroscopy---HINDAWI LTD