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Submitted on: 17 December 2007.
Revised on: 07 January 2008.
Accepted on: 03 March 2008.
___________________Communications in Applied and Industrial Mathematics
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Submitted on: 26 March 2017.
Revised on: 29 June 2017.
Accepted on: 24 July 2017.
___________________Communications in Applied and Industrial Mathematics
Submitted on: 28 January 2005.
Revised on: 22 April 2005.
Accepted on: 11 June 2005.
___________________Communications in Applied and Industrial Mathematics
Submitted on: 14 January 2004.
Revised on: 03 May 2004.
Accepted on: 21 May 2004.
___________________Communications in Applied and Industrial Mathematics
Submitted on: 07 May 2000.
Revised on: 22 June 2000.
Accepted on: 16 August 2000.
___________________Communications in Applied and Industrial Mathematics
Submitted on: 23 December 1999.
Revised on: 31 January 2000.
Accepted on: 10 March 2000.
___________________Communications in Applied and Industrial Mathematics
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