Agustina, P. N., and W. D. Agastya. “The Impact of Pneumococcal Conjugate Vaccines on Pneumonia in Children: A Review of Recent Studies”. Journal of Diverse Medical Research: Medicosphere, vol. 1, no. 3, Sept. 2024, pp. 5-15, doi:10.33005/jdiversemedres.v1i3.131.