American Journal of Economics and Business Administration 2 ( 1 ): 120 - 128 , 2010
American Journal of Economics and Business Administration 2 ( 1 ): 12 - 19 , 2010
American Journal of Economics and Business Administration 2 ( 3 ): 307 - 316 , 2010
Journal of Economics Theory 6 ( 3 ): 91 - 98 , 2012
Journal of Social Sciences 6 ( 1 ): 74 - 84 , 2010