4Fulton, M. E. and K. Gannakas ,2000 :Organizational Commitment in a Mixed Oligopoly : Agricultural Cooperatives and Investorowned Firms, American Journal of Agricultural Economics,83 (5)
5Shil Kwan Lee. Cooperatives in Asia and Pacific. On 30-year rural reform in china : development of china's farmer cooperatives. 2008, sep, hangzhou zhejiang province
