Zaim O (2004). “Measuring Environmental Performance of State Manufacturing through Changes in Pollution Intensities: A DEA Framework.” Ecological Economics 48(1): 37.

Zaim O and F Taskin (1997). “The Comparative Performance of the Public Enterprise Sector in Turkey: A Malmquist Productivity Index Approach.” J Comparative Economics 25: 129-157.

Yuezhou C and W Wenjiang (2001). “Synthetic Financial Evaluation by a Method of Combining DEA with AHP.” International Transactions in Operational Research 8(5): 603-608.

Yun Y, M Arakawa and H Nakayama (2004). “Fitness Evaluation Using Generalized Data Envelopment Analysis in Moga.? in Proceedings of the 2004 Congress on Evolutionary Computation, IEEE. 1: 464-471.

Yun Y, H Nakayama, T Tanino and M Arakawa (2000). “A Multiobjective Optimization Method Combining Generalized Data Envelopment Analysis and Genetic Algorithms.” Transactions of the Institute of Systems, Control and Information Engineers 13(4): 179-185.

Yun Y, M Yoon and H Nakayama (2005). “Genetic Algorithm for Multi-Objective Optimization Using G DEA.? in Lecture Notes in Computer Science, Springer Verlag, Heidelberg, Germany. 3612: 409-416.

Yun YB, H Nakayama and M Arakawa (2004). “Multiple Criteria Decision Making with Generalized DEA and an Aspiration Level Method.” EJOR 158(3): 697-706.

Yun YB, H Nakayama and T Tanino (2000). “On Efficiency of Data Envelopment Analysis.” Lecture Notes in Economic and Mathematics 48: 208-217.

Yun YB, H Nakayama and T Tanino (2004). “A Generalized Model for Data Envelopment Analysis.” EJOR 157(1): 87-105.

Yun YB, H Nakayama, T Tanino and M Arakawa (1999). “A Multi-Objective Optimization Method Combining Generalized Data Envelopment Analysis and Genetic Algorithms.? in Proceedings of 1999 IEEE, Man, and Cybernetics, IEEE. 1: 671-676.