4Magrath,Allan J,Hardy,et al.Selecting sales and distribution channels. Industrial Marketing Management, 1987,16, (4) :273-278.
5Soniia David ,Sarah Kasozi Charles Wortmann.An investigation of alternative bean seed marketing channels in UGANDA. Occasional Publications Series, 1997.
7Boone T,Ganeshan R.The value of information sharing in the retail supply chain:two case studies.Foresight: The International Journal of Applied Forecasting, 2008,9 : 12-17.
8Huang Y,Liu S W.Fuzzy comprehensive evaluation model and empirical study of seeds industry distributor, the 2009 IEEE international conference on yrey systems and intelligent services (GSIS2009),2009,11: 1051-1056.
9Aigner, D. J. , Lovell, C. A. K. , Schmidt, P. , 1977. Formulation and estimation of stochastic frontier production function models. Journal of Econometrics 6, 21-37.