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Submitted on: 20 November 2006.
Revised on: 19 December 2006.
Accepted on: 09 January 2007.
___________________ACTA PHYSICA POLONICA B---JAGIELLONIAN UNIV PRESS
Submitted on: 15 December 2008.
Revised on: 12 January 2009.
Accepted on: 01 February 2009.
___________________ACTA PHYSICA POLONICA B---JAGIELLONIAN UNIV PRESS
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Submitted on: 09 October 2011.
Revised on: 16 January 2012.
Accepted on: 15 March 2012.
___________________ACTA PHYSICA POLONICA B---JAGIELLONIAN UNIV PRESS
Submitted on: 03 April 2005.
Revised on: 26 April 2005.
Accepted on: 15 June 2005.
___________________ACTA PHYSICA POLONICA B---JAGIELLONIAN UNIV PRESS
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Submitted on: 01 March 1998.
Revised on: 18 May 1998.
Accepted on: 04 June 1998.
___________________ACTA PHYSICA POLONICA B---JAGIELLONIAN UNIV PRESS
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