Ott JJ, Irving G, Wiersma ST (December 2012). «Long-term protective effects of hepatitis A vaccines. A systematic review». Vaccine31 (1): 3–11. doi:10.1016/j.vaccine.2012.04.104. PMID22609026.
Ott JJ, Irving G, Wiersma ST (December 2012). «Long-term protective effects of hepatitis A vaccines. A systematic review». Vaccine31 (1): 3–11. doi:10.1016/j.vaccine.2012.04.104. PMID22609026.