1. World Hep Alliance, Hepatitis B and C. Available from: http://www.worldhepatitisday.com/HepatitisBandC.aspx. Cited on 14 April 2009.
2. World Health Organization (WHO). Dept. of Communicable diseases surveillance and Response. WHO/CDC/CSR/LYO/2002.2: Hepatitis B. Available from: http://www.who.int/csr/disease/hepatitis/HepatitisB_whocdscsrlyo2002_2.pdf. Cited on 14 April 2009.
3. WHO position paper, Hep A;World Health Organization (WHO);Week Epidemiol Rec,2000
4. WHO position paper Hep B;World Health Organization (WHO);Week Epidemiol Rec,2004
5. A two dose schedule for combined hepatitis A and hepatitis B vaccination in children ages one to eleven years;Van Der Wielen;Pediatr Infect Dis J,2000