Shareef , Taha Najwan Tawfeeq, Zainab Sherzad Ali, and Zainab Wadallah A ziz. “Characterization of Bioactive Secondary Metabolites Produced by Streptococcus Pneumoniae, Mechanism of Colonization, and New Vaccine Strategies”. Journal of Current Medical Research and Opinion 7, no. 06 (June 7, 2024): 2733–2756. Accessed May 31, 2026. http://www.cmro.in/index.php/jcmro/article/view/828.