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Kim NH, Lee J, Lee SJ, Lee H, Kim KH, Park SE, et al. (November 2007). "Immunogenicity and safety of pneumococcal 7-valent conjugate vaccine (diphtheria CRM(197) protein conjugate; Prevenar ) in Korean infants: differences that are found in Asian children". Vaccine. 25 (45): 7858–7865. doi:10.1016/j.vaccine.2007.08.022. PMID17931753.
World Health Organization (2008). "23-valent pneumococcal polysaccharide vaccine : WHO position paper". Wkly. Epidemiol. Rec. 83 (42): 373–84. hdl:10665/241217. PMID18927997.