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Submitted on: 17 March 1998.
Revised on: 10 May 1998.
Accepted on: 22 June 1998.
___________________APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY
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Submitted on: 12 April 2004.
Revised on: 07 May 2004.
Accepted on: 01 July 2004.
___________________APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY
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