9Gail. L. Gramer Agricultural Economics and Agribusiness[J]. London: 2004,(2) : 12-17. 被引量:1
10Beckmann, Volker, Boger. Contract Enforcement in Transi tion Agriculture Theory and Evidence From Poland[J]. Annu al Conference Paper of International Society for the New Insti tutional Economic, 2002, (2): 23 -31. 被引量:1