1. Roberts MJ, Hsiao W, Berman P, Reich MR: Getting health reform right. 2004, New York: Oxford University Press
2. World Health Organization: The World Health Report 2000. Health systems: improving performance. 2000, Geneva: World Health Organization
3. Townsend P, Davidson N: Inequalities in Health: The Black Report and the Health Divide. 1982, Harmondworth: Penguin
4. Hummer RA, Rogers RG, Eberstein IW: Sociodemographic differentials in adult mortality: a review of analytic approaches. Population and Development Review. 1998, 24 (3): 553-578. 10.2307/2808154.
5. Murray CJL, Frenk J: A framework for assessing the performance of health systems. Bull World Health Organ. 2000, 78 (6): 717-731.