[19] Moyen N. Investment cash flow sensitivities: constrained versus unstrained firms[J]. Journal of Finance, 2004(59) 2061-2092
[20] Goyal M, Netessine S. Strategic technology choice and capacity investmen demand uncertainty[J]. Management Science,2007,53(2):192.
[21] Hong Bo,Robert Lensink,Elmer Sterken. Uncertainty and Financing Constraints[J].European Finance Review,2003,(7):297-321.
[22] Mason R,Weeds H. Investment, uncertainty and pre-emption[J]. International Journal of Industria Organization,2010,28(3):278-287.
[23] Kaplan Steven,Zingales L. Do Financing Constraints Explain Why Investment is Correlated with Cash Flow[J] .Quarterly Journal of Economics,1997,112(2):169-215 .