7Almeida, H., Campello, M., and Weisbach, M.S., 2004. The Cash Flow Sensitivity of Cash [ J ]. The Journal of Finance, (4) : 1777-1804.
8Athey, M.J.,and Laumas,P.S., 1994. Internal Funds and Corporate Investment in India[J ]. Journal of Development Economics, (45):287-303.
9Charles ,J.H., and Joshua, R.P., 2010. New Evidence on Measuring Financial Constraints:Moving beyond the KZ Index[J ]. Review of Financial Studies, ( 23 ) : 1909-1940.
10Cleary,S.,Povel,P.,and Raith,M.,2007. The U-Shaped Investment Curve:Theory and Evidence [J]. Journal of Financial and Quantitative Analysis,42( 1 ) : 1-39.