1Cesar Calderon, Alberto Chong, Ernesto Stein. Trade Intensity and Business Cycle Synchronization: Are Development Countries Any Different [J]. Journal of International Economics, 2007, 71 (1): 2-21.
2Jeffrey A., Frankel, Andrew K.Rose. The Endogeneity of the Optimum Currency Area Criteria [J]. Economic Journal, 1998 (108): 1009-1025.
