Xu X-D (2005). ?DEA Model with Adjustable Preference Intensity and Its’ Application.” J Wuhan University of Technology 27(5): 86-89.

Xue M and PT Harker (2002). “Note: Ranking DMUs with Infeasible Super-Efficiency DEA Models.” Management Science 48(5): 705-710.

Wu W (1998). “Discussion on the Assessed Decision Making Unit in DEA.” ournal of Wuhan University of Technology 20(1): 92-95.

Wu W (1999). “Discussion on the Theorem for Identifying the Efficient DMUs in DEA.” System Engineering Theory and Practice 19(8): 42-44.

Wu W (1999). “Theorems on Optimal Value of DEA Model (C.C.G.S.S) and its Application in Simplification on Forecasting Method.” System Engineering Theory and Practice 19(9): 105-108.

Wu W-j (2005). “Further Discussion on the Existence of Optimal Solution and the Sensitivity Analysis for CCR Model.” J Systems Engineering 20(2): 220-224.

Wu WJ (2001). “Study on Analysis of Returns to Scale Using DEA.” System Engineering Theory and Practice 21(9): 85.

Wu WY, HJ Tsai, KY Cheng and MK Lai (2006). “Assessment of Intellectual Capital Management in Taiwanese Ic Design Companies: Using DEA and the Malmquist Productivity Index.” R and D Management 36(5): 531-545.

Wu X, S-J Hu, Y-P Cui and Y-J Ma (2005). “Study on the Evaluation of Harmonious Development between Railway Transportation and Economy.” J China Railway Society 27(3): 20-25.

Wu J, H Zuo and H Wang (2006). “Evaluation Method for Maintenance Cost Target of New Civil Aircraft.” J Nanjing University of Aeronautics and Astronautics 38(2): 186-191.