6H. O. Fried,C. A. K. Lovell,S. S. Schmidt,S. Yaisawarng.??Accounting for Environmental Effects and Statistical Noise in Data Envelopment Analysis(J)Journal of Productivity Analysis . 2002 (1)
7A. Charnes,W.W. Cooper,E. Rhodes.Measuring the efficiency of decision making units. European Journal of Operational Research . 1978
8Binswanger P H,Peter H.Risk aversion,colateral requirements and the market for credit and insurance in rural areas. . 1996
9Binswanger,HP.Attitudes toward risk: experimental measurement in rural India. American Journal of Agricultural Economics . 1980