Fortina, R., C. U.W, S. Syamsul, C. S.S, and R. Riyanti. “A Surveillance Analysis of Case Findings in the Prevention and Control of Pneumonia in Children under Five Years Old: A Literature Review”. Journal of Public Health in Africa, vol. 14, no. s2, May 2023, doi:10.4081/jphia.2023.2620.