Ott JJ, Irving G, Wiersma ST (december 2012). "Long-term protective effects of hepatitis A vaccines. A systematic review". Vaccine. 31 (1): 3-11. doi:10.1016/j.vaccine.2012.04.104. PMID22609026.
Irving GJ, Holden J, Yang R, Pope D (2012). "Hepatitis A immunisation in persons not previously exposed to hepatitis A". Cochrane Database Syst Rev. 7: CD009051. doi:10.1002/14651858.CD009051.pub2. PMID22786522.
Ott JJ, Irving G, Wiersma ST (december 2012). "Long-term protective effects of hepatitis A vaccines. A systematic review". Vaccine. 31 (1): 3-11. doi:10.1016/j.vaccine.2012.04.104. PMID22609026.
Irving GJ, Holden J, Yang R, Pope D (2012). "Hepatitis A immunisation in persons not previously exposed to hepatitis A". Cochrane Database Syst Rev. 7: CD009051. doi:10.1002/14651858.CD009051.pub2. PMID22786522.