4Yiyo Kuo,Taho Yang, Guan-Wei Huang.The use of grey relational analysis in solving multipleattribute decisionmaking problems [J ].Scinece Direct 2008,80-93.
10Yasser Abdih & Frederick L.Joutz.Relating the knowledge production function to total factor productivity:Anendogenous growth puz zle[R].IMF Working Paper,2005.