Zhang T, L-Y Sun and H-H Sun (2003). “Application of a Preference Restraint Cone DEA Model in Vendor Selection.” System Engineering Theory and Practice 23(3): 77.

Zhang T, L-Y Sun and H-H Sun (2003). “Application of a Preference Restraint Cone DEA Model in Vendor Selection.” System Engineering Theory and Practice 23(3): 77.

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