4Ben L, Andrew R. Grain Reserves and the Food Price Crisis: Selected Writings from 2008 -2012 [ R]. Institute for Agriculture and Trade Policy, 2012.
5Stolovitch, Harold D. Frame Games and Game Chains: A Technology for Interactive Teaching/Learning[ J]. Viewpoints in Teach- ing and Learning, 1982, 58 (3).
7Joachim V B, Maximo T. Implementing Physical and Virtual Food Reserves to Protect the Poor and Prevent Market Failure[ J]. IFPRI Policy Brief, 2009, (2).
