Chen, M. (2004). Grey systems: Theory and applications. Emerald Group Publishing.
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Chicago-čujuhus (17. p.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Bradford, West Yorkshire, England: Emerald Group Publishing, 2004.
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MLA-čujuhus (9. p.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Emerald Group Publishing, 2004.
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