Submitted on: 17 September 2004.
Revised on: 23 December 2004.
Accepted on: 06 February 2005.
___________________Arabian Journal of Chemistry---ELSEVIER
Submitted on: 25 September 2012.
Revised on: 21 December 2012.
Accepted on: 15 January 2013.
___________________Arabian Journal of Chemistry---ELSEVIER
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Submitted on: 06 August 2015.
Revised on: 13 September 2015.
Accepted on: 03 October 2015.
___________________Arabian Journal of Chemistry---ELSEVIER
Submitted on: 22 February 2006.
Revised on: 10 May 2006.
Accepted on: 26 June 2006.
___________________Arabian Journal of Chemistry---ELSEVIER
Submitted on: 15 April 1998.
Revised on: 19 June 1998.
Accepted on: 13 July 1998.
___________________Arabian Journal of Chemistry---ELSEVIER
Submitted on: 16 August 2019.
Revised on: 30 November 2019.
Accepted on: 03 January 2020.
___________________Arabian Journal of Chemistry---ELSEVIER
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