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Submitted on: 04 August 2011.
Revised on: 17 November 2011.
Accepted on: 09 December 2011.
___________________BIOCHEMICAL SYSTEMATICS AND ECOLOGY
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Submitted on: 16 October 2006.
Revised on: 17 November 2006.
Accepted on: 20 December 2006.
___________________BIOCHEMICAL SYSTEMATICS AND ECOLOGY