Nurjanah, R., Dwipoerwantoro, P. and Darwis, D. (2009) “Seroepidemiology of Helicobacter pylori in primary school students in Krotek, Cibeber Village, Serang District, Banten, Indonesia”, Paediatrica Indonesiana, 49(5), pp. 264-9. doi: 10.14238/pi49.5.2009.264-9.