4Altman E I, Saunders A. Credit risk measurement: Developments over the last 20 years[J]. Journal of banking & Finance,1997, (21): 1721- 1742.
5Altman E I, Financial Ratoss. Discriminant Analysis and the Prediction of corporate Bankruptcy[J]. Journal of Finance,1968, (23) : 589 - 609.
6Suleyman Basak and Alexander Shapiro.Value-at-risk-based risk management:optimal policies and asset prices[J].Review of Financial Studies,2001,14(2):371 ～ 405.
