3Coulter J, Onumal G. The role of warehouse receipt systems in enhanced commodity marketing and rural livelihoods in Africa[J].Food Policy, 2002, 27:319～337
4Christa Hainz. Bank competition and credit markets in transition economics [J]. Journal of Comparative Economics, 2003, 31:223～245
5Buraschi A, Monini D. Liquidity risk and special [J]. Journal of Financial Economics, 2002, 64:243～268
6Cetin Ciher. Information contest of volume: an investigation of Tokyo commodity futures markets [J]. Pacific-Basin Finance Journal, 2002, 10:201～215
7Erik Lehmann, Doris Neubergen. Do lending relationships matter?evidence from bank survey data in Germany [J]. Journal of Economic Behavior & Organization, 2001, 45:339～359
8Michael E sykwta. Future trading and supply contract in the oil refine industry[J]. Journal of Corporate Finance, 1996, 2:317～2 334
