1Fisher. Determinants of risk Premiums on corporate bonds[J]. Journal of Political Economy, 1959, (6).
2Martin, L. , Henderson, G. , Perry, L. , T. P. Cronan. Bond rat- ings. Predictions Using rating agency criteria [R]. Washington: Arizona State University,1984.
3Trevino,L. , S. Thomas. Systematic differences in the determi- nants of foreign currency sovereign ratings by rating agency [M]. discussion papers in accounting and management science 00- 153, School of Management, University of Southampton, UK, 2000a.