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2. Bumper crops;Baumann;Car and Driver,2013
3. Nonlinear programming: Theory and algorithms;Bazaraa,2013
4. Brundtland, G., Khalid, M., Agnelli, S., Al-Athel, S., Chidzero, B., Fadika, L., et al. (1987). Report of the world commission on environment and development: Our common future (‘Brundtland Report’).
5. Customer preferences, supply-chain costs, and product-line design;Chen,1998