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Submitted on: 09 March 2010.
Revised on: 23 June 2010.
Accepted on: 05 July 2010.
___________________ANIMAL COGNITION---SPRINGER HEIDELBERG
Submitted on: 20 August 2014.
Revised on: 14 October 2014.
Accepted on: 26 October 2014.
___________________ANIMAL COGNITION---SPRINGER HEIDELBERG
Submitted on: 13 May 2000.
Revised on: 01 August 2000.
Accepted on: 17 August 2000.
___________________ANIMAL COGNITION---SPRINGER HEIDELBERG
Submitted on: 30 May 2003.
Revised on: 27 August 2003.
Accepted on: 28 September 2003.
___________________ANIMAL COGNITION---SPRINGER HEIDELBERG
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