Wutun, N. D. S., M. D. C. Lerik, and M. Muntasir. “Risk Factors of Pneumonia in Children under Five in Lewoleba Hospital, East Nusa Tenggara, Indonesia”. Journal of Epidemiology and Public Health, vol. 5, no. 2, Apr. 2020, pp. 218-26, https://jepublichealth.com/index.php/jepublichealth/article/view/298.