3D G Proverbs, G D Holt, P O Olomolaiye. A method for estimating laborrequirements and costs for international construction projects at inception[J]. Building and Environment, 1999(34).
4Deng Julong. Grey systems[J]. China's Future and Development, 1984(4).
5Zha Jingmin,Zhong Donghua. Decision with grey correlation AHP[J].Journal of System Science & System Engineering,2005,5 (1).
