References
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- Eilon , S. and Chowdhury , I. 1976 . Conditions for optimal scheduling for the three-machine problem . Instructional Mathematics Applications , 17 : 1 – 4 .
- Johnson , S. M. 1954 . Optimal two and three stage production schedules with set-up time included . Naval Research Logistic Quarterly , : 61 – 68 .