1. Life Insurance Fact Book 2014 (The American Council of Life Insurers;ACLI,2014
2. Socioeconomic Status and Health: the Challenge of the Gradient;N E Adler;American Psychologist,1994
3. Current Cigarette Smoking among Adults-United States;I T Agaku;Morbidity and Mortality Weekly Report,2005
4. Consumption;O P Attanasio;Handbook of Macroeconomics,1999
5. Life Insurance of the Elderly: Adequacy and Determinants;A J Auerbach;Health, and Income among the Elderly,1987