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Submitted on: 27 June 2004.
Revised on: 11 August 2004.
Accepted on: 10 September 2004.
___________________Journal of the Korean Society for Industrial and Applied Mathematics
Submitted on: 01 April 2014.
Revised on: 09 May 2014.
Accepted on: 21 May 2014.
___________________Journal of the Korean Society for Industrial and Applied Mathematics
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Submitted on: 27 December 2007.
Revised on: 08 March 2008.
Accepted on: 23 April 2008.
___________________Journal of the Korean Society for Industrial and Applied Mathematics
Submitted on: 11 July 2022.
Revised on: 14 October 2022.
Accepted on: 28 October 2022.
___________________Journal of the Korean Society for Industrial and Applied Mathematics
Submitted on: 28 May 2008.
Revised on: 02 July 2008.
Accepted on: 02 August 2008.
___________________Journal of the Korean Society for Industrial and Applied Mathematics
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