Submitted on: 14 October 2016.
Revised on: 16 January 2017.
Accepted on: 13 March 2017.
___________________International Journal of Industrial Engineering Computations
Submitted on: 16 July 2020.
Revised on: 24 October 2020.
Accepted on: 14 November 2020.
___________________International Journal of Industrial Engineering Computations
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Submitted on: 27 October 1998.
Revised on: 21 December 1998.
Accepted on: 14 February 1999.
___________________International Journal of Industrial Engineering Computations