Submitted on: 04 January 2002.
Revised on: 18 February 2002.
Accepted on: 11 April 2002.
___________________BIOLOGY & PHILOSOPHY---SPRINGER
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Submitted on: 18 October 2008.
Revised on: 13 February 2009.
Accepted on: 09 March 2009.
___________________BIOLOGY & PHILOSOPHY---SPRINGER
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Submitted on: 23 May 2016.
Revised on: 18 June 2016.
Accepted on: 02 August 2016.
___________________BIOLOGY & PHILOSOPHY---SPRINGER
Submitted on: 23 January 1999.
Revised on: 03 March 1999.
Accepted on: 12 April 1999.
___________________BIOLOGY & PHILOSOPHY---SPRINGER
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Submitted on: 21 November 1998.
Revised on: 12 February 1999.
Accepted on: 03 March 1999.
___________________BIOLOGY & PHILOSOPHY---SPRINGER