我在做毕业论文，目前急需两篇LITERATURE，找了很多地方都找不到
1,Haushalter, G.D., 2000 Financing policy, basis risk, and corporate hedging :Evidence from oil and gas producers. Journal of Finance 55, 107-152
2, Guay, W.R., 1999. The impact of derivatives on firm risk: An empirical examination of new derivative users. Journal of Accounting and Economics 26, 319-351

谢谢！！！！