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HARVARD Citation
Liu, S. et al. (2015). Four basic models of GM(1, 1) and their suitable sequences. Grey systems. 5 (2), pp. 141-156. [Online].
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Liu, S. et al. (2015). Four basic models of GM(1, 1) and their suitable sequences. Grey systems. 5 (2), pp. 141-156. [Online].