1. Ackerman, S. (1999). The ever-present yet nonexistent poor. Extra!, January/February, pp. 9–10.
2. Socioeconomic inequalities in health;Adler;Journal of the American Medical Association,1993
3. Alexander, G. J., & Kanner, R. E. (1995). Air pollution: From irritating to life-threatening. IM (Internal Medicine) October, 41–53.
4. Risk factors for pediatric asthma;Aligne;American Journal of Respiration and Critical Care Medicine,2000
5. Amato, I. (1999). Can we make garbage disappear? Time, November 8.