Submitted on: 09 November 1999.
Revised on: 16 December 1999.
Accepted on: 18 January 2000.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
Submitted on: 29 May 2019.
Revised on: 17 August 2019.
Accepted on: 24 September 2019.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
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Submitted on: 17 October 2024.
Revised on: 30 December 2024.
Accepted on: 14 February 2025.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
Submitted on: 08 January 1998.
Revised on: 04 February 1998.
Accepted on: 26 February 1998.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE