Não informado. (2000). Informs. Institute for Operations Research and the Management Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Informs. Baltimore, Md: Institute for Operations Research and the Management Sciences, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Informs. Institute for Operations Research and the Management Sciences, 2000.
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