Submitted on: 02 March 1998.
Revised on: 14 March 1998.
Accepted on: 07 April 1998.
Sophia
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Submitted on: 24 March 2011.
Revised on: 03 May 2011.
Accepted on: 11 May 2011.
Sophia---SPRINGER
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Submitted on: 27 March 2000.
Revised on: 15 April 2000.
Accepted on: 30 April 2000.
Sophia---SPRINGER
Submitted on: 14 October 2007.
Revised on: 20 November 2007.
Accepted on: 13 December 2007.
Sophia---SPRINGER
Submitted on: 24 March 2022.
Revised on: 04 May 2022.
Accepted on: 13 May 2022.
Sophia
Submitted on: 09 October 2003.
Revised on: 30 October 2003.
Accepted on: 26 November 2003.
Sophia---SPRINGER
Submitted on: 21 July 2007.
Revised on: 27 August 2007.
Accepted on: 02 September 2007.
Sophia
Submitted on: 06 May 2004.
Revised on: 01 June 2004.
Accepted on: 18 June 2004.
Sophia