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Submitted on: 01 March 1999.
Revised on: 09 May 1999.
Accepted on: 24 June 1999.
___________________IMA JOURNAL OF APPLIED MATHEMATICS
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Submitted on: 12 December 2012.
Revised on: 27 February 2013.
Accepted on: 20 March 2013.
___________________IMA JOURNAL OF APPLIED MATHEMATICS
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Submitted on: 16 July 2001.
Revised on: 12 September 2001.
Accepted on: 24 September 2001.
___________________IMA JOURNAL OF APPLIED MATHEMATICS
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Submitted on: 09 September 2019.
Revised on: 28 October 2019.
Accepted on: 13 December 2019.
___________________IMA JOURNAL OF APPLIED MATHEMATICS
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Submitted on: 30 October 2021.
Revised on: 22 November 2021.
Accepted on: 08 January 2022.
___________________IMA JOURNAL OF APPLIED MATHEMATICS