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Submitted on: 13 December 2001.
Revised on: 01 March 2002.
Accepted on: 14 April 2002.
___________________Acta Chimica Slovaca---SCIENDO
Submitted on: 17 January 2005.
Revised on: 26 March 2005.
Accepted on: 05 May 2005.
___________________Acta Chimica Slovaca---SCIENDO
Submitted on: 30 April 2007.
Revised on: 05 July 2007.
Accepted on: 28 July 2007.
___________________Acta Chimica Slovaca---SCIENDO
Submitted on: 08 March 2011.
Revised on: 01 July 2011.
Accepted on: 05 August 2011.
___________________Acta Chimica Slovaca---SCIENDO
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Submitted on: 19 August 2019.
Revised on: 21 October 2019.
Accepted on: 14 November 2019.
___________________Acta Chimica Slovaca---SCIENDO