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Submitted on: 25 December 1999.
Revised on: 17 January 2000.
Accepted on: 03 March 2000.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
Submitted on: 11 June 2020.
Revised on: 08 August 2020.
Accepted on: 30 August 2020.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
Submitted on: 30 October 1999.
Revised on: 08 January 2000.
Accepted on: 02 February 2000.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
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http://reply.papertrans.cn/2/164/16340/16340-16.png
Submitted on: 23 March 2000.
Revised on: 08 July 2000.
Accepted on: 24 July 2000.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
Submitted on: 12 March 2012.
Revised on: 14 June 2012.
Accepted on: 13 July 2012.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
http://reply.papertrans.cn/2/164/16340/16340-19.png
Submitted on: 15 September 1999.
Revised on: 08 October 1999.
Accepted on: 04 December 1999.
___________________JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY