1. Suicide over the life cycleRisk factors, assessment and treatment of suicidal patients.;Blumenthal,1990
2. Adolescent stress;Colton,1991
3. Substance abuse and adolescent suicidal behaviour;Crumley;Journal of American Medical Association,1990
4. Ehrlich, R., & Bourne, D. E. (1994). Trends in deaths from tobacco related lung disease in South Africa. Paper presented at the ninth world conference on tobacco or health, Paris, October.
5. Patterns of alcohol use and the risk of drinking among US high school students;Escobedo;American Journal of Public Health,1995