Submitted on: 20 June 2007.
Revised on: 06 October 2007.
Accepted on: 22 October 2007.
___________________Applicable Analysis and Discrete Mathematics
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Submitted on: 06 September 2021.
Revised on: 03 January 2022.
Accepted on: 24 January 2022.
___________________Applicable Analysis and Discrete Mathematics
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Submitted on: 04 June 2014.
Revised on: 29 August 2014.
Accepted on: 13 September 2014.
___________________Applicable Analysis and Discrete Mathematics
Submitted on: 27 December 2002.
Revised on: 01 March 2003.
Accepted on: 28 April 2003.
___________________Applicable Analysis and Discrete Mathematics
Submitted on: 28 July 2008.
Revised on: 02 September 2008.
Accepted on: 30 October 2008.
___________________Applicable Analysis and Discrete Mathematics
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http://reply.papertrans.cn/1/22/2131/2131-19.png
Submitted on: 26 July 2005.
Revised on: 29 September 2005.
Accepted on: 20 November 2005.
___________________Applicable Analysis and Discrete Mathematics