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Submitted on: 25 October 2005.
Revised on: 16 November 2005.
Accepted on: 30 November 2005.
Mathematical Thinking and Learning
Submitted on: 31 May 1999.
Revised on: 29 June 1999.
Accepted on: 09 July 1999.
Mathematical Thinking and Learning
Submitted on: 26 July 2003.
Revised on: 03 September 2003.
Accepted on: 30 September 2003.
Mathematical Thinking and Learning
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Submitted on: 21 January 2001.
Revised on: 11 February 2001.
Accepted on: 07 March 2001.
Mathematical Thinking and Learning
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Submitted on: 16 November 2011.
Revised on: 05 December 2011.
Accepted on: 18 December 2011.
Mathematical Thinking and Learning