Firmansyah, I., Ginting, S., Lubis, M., Lubis, I., Pasaribu, S. and Lubis, C. (2016) “Factors associated with the transmission of soil-transmitted helminthiasis among schoolchildren”, Paediatrica Indonesiana, 44(4), pp. 127-32. doi: 10.14238/pi44.4.2004.127-32.