Hutabarat, M., F. Hamid, I. Djaharuddin, A. Zainuddin, R. Agus, and M. Massi. “Detection of LytA Genes in Streptococcus Pneumoniae Isolated from Sputum Pneumonia Patients”. Biomedika, Vol. 13, no. 1, July 2020, pp. 23-30, doi:https://doi.org/10.31001/biomedika.v13i1.718.