1. World Health Organization. Hepatitis B vaccine-making global progress. EPI Update 31, 1996. Geneva: World Health Organization.
2. Status of hepatitis B immunization programmes in 1998;Kane;Vaccine,1998
3. World Health Organization. Hepatitis B. www.who.int/gpv-dvacc/diseases/hepatitis b.htm.
4. Universal heparitis B immunization: infant, and infant plus adolescent immuruzation;Bonanni;Vaccine,1998
5. Jilg W, Schmidt M, Deinhardt F. Hepatitis B vaccination: strategy for booster doses in high risk population groups. In: Coursaget P, Tong MJ, editors. Progress in Hepatitis B Immunization. John Libbey Eurotext Ltd, Monotrogue, France, 1990. pp. 419–427.