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Submitted on: 15 July 2017.
Revised on: 24 August 2017.
Accepted on: 08 October 2017.
___________________JOURNAL OF MATHEMATICAL PSYCHOLOGY
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Submitted on: 05 August 1999.
Revised on: 17 October 1999.
Accepted on: 28 October 1999.
___________________JOURNAL OF MATHEMATICAL PSYCHOLOGY