D. M. Sinaga, M. G. Robson, B. T. Gasong, A. G. Halel, and D. Pertiwi, “Fecal coliform bacteria and factors related to its growth at the Sekotong shallow wells (West Nusa Tenggara, Indonesia)”, Public Health of Indonesia, vol. 2, no. 2, pp. 47–54, May 2016.