1. Epidemiological patterns of hepatitis A in different parts of the world;Gust;Vaccine,1992
2. The epidemiologic study of seroprevalence of hepatitis A and B antibodies in Seoul;Hong;Kor. J. Intern. Med.,1982
3. Byun KS, Kweon SY, Shin SW et al., Epidemiology of hepatitis A in Kyungin area, Kor. J. Intern. Med. 1991;20
4. Epidemiology of HAV infection in Seoul;Jung;J. Kor. Gastroenterol.,1995
5. Changing prevalence of hepatitis A in Malaysia;Malik,1994