Gupta, P. (2003). Problems in operations research: methods and: Solutions. Sultan Chand.
Chicago-čujuhus (17. p.)Gupta, P.K. Problems in Operations Research: Methods and: Solutions. New Delhi: Sultan Chand, 2003.
MLA-čujuhus (9. p.)Gupta, P.K. Problems in Operations Research: Methods and: Solutions. Sultan Chand, 2003.
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