Submitted on: 15 October 2002.
Revised on: 27 November 2002.
Accepted on: 19 December 2002.
___________________Journal of Mathematical Behavior
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Submitted on: 04 January 1998.
Revised on: 17 March 1998.
Accepted on: 09 May 1998.
___________________Journal of Mathematical Behavior
Submitted on: 11 November 2021.
Revised on: 07 February 2022.
Accepted on: 27 March 2022.
___________________Journal of Mathematical Behavior
Submitted on: 05 November 2015.
Revised on: 01 January 2016.
Accepted on: 31 January 2016.
___________________Journal of Mathematical Behavior
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Submitted on: 30 March 2005.
Revised on: 10 July 2005.
Accepted on: 08 August 2005.
___________________Journal of Mathematical Behavior
Submitted on: 29 August 2022.
Revised on: 17 October 2022.
Accepted on: 11 November 2022.
___________________Journal of Mathematical Behavior