Sunyataningkamto, S., I. Z, A. T, B. I, A. Surjono, T. Wibowo, E. Lestari, and D. Wastoro. “The Role of Indoor Air Pollution and Other Factors in the Incidence of Pneumonia in Under-Five Children”. Paediatrica Indonesiana, Vol. 44, no. 1, Oct. 2016, pp. 25-9, doi:10.14238/pi44.1.2004.25-9.