5\ SEXTON, R. J., & ISKOW, J. The competitive role of cooperatives in market - oriented economies: A policy analysis [M] . in Csaki, C., & Kislev, Y. (ed.), Agricultural Cooperatives in Transition, Boulder Colo. : Westview Press, 1993, 55 - 83.
6BARTON, D. G. What is a cooperative? [M]. in Cobia D. W. (ed.). Cooperatives in Agriculture. Prentice - Hall, Inc. New Jersey, 1989, 1 - 1.
7PORTER, P. K., & SCULLY, G. W. Economic efficiency in cooperatives[J]. The Journal of Law and Economics, 1987, 30(2), 489-512.
8CHADDAD, F. R., & COOK, M. L. An ownership rights typology of cooperative models[ R]. Department of Agricultural Economics, Working Paper, No. AEWP, 2002, 6.
9I HART, O.,& MOORE, J. The governance of exchanges: members' cooperatives versus outside ownership[J]. Oxford Review of Economic Policy, 1996, 12(4), 53 -69.
10HERBST, P., & PRUFER, J. Firms, nonprofits and cooperatives: a theory of organizational choice [R]. Working paper, 2007, papers, ssrn. com.
