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Submitted on: 22 September 2005.
Revised on: 18 December 2005.
Accepted on: 10 January 2006.
___________________IMA Journal of Management Mathematics
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Submitted on: 10 January 2005.
Revised on: 06 April 2005.
Accepted on: 04 June 2005.
___________________IMA Journal of Management Mathematics
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Submitted on: 16 January 1998.
Revised on: 16 February 1998.
Accepted on: 19 March 1998.
___________________IMA Journal of Management Mathematics
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Submitted on: 06 July 2024.
Revised on: 23 October 2024.
Accepted on: 14 December 2024.
___________________IMA Journal of Management Mathematics
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Submitted on: 12 June 2010.
Revised on: 03 July 2010.
Accepted on: 23 August 2010.
___________________IMA Journal of Management Mathematics