Yohmi, E., A. Boediarso, and S. R. Hadinegoro. “Lactose Malabsorption Based on Breath Hydrogen Test in Children With Recurrent Abdominal Pain”. Paediatrica Indonesiana, Vol. 44, no. 6, Oct. 2016, pp. 215-21, doi:10.14238/pi44.6.2004.215-21.