Patel, M (25 January 2005). “Polysaccharide vaccines for preventing serogroup A meningococcal meningitis.”. The Cochrane database of systematic reviews (1): CD001093. doi:10.1002/14651858.CD001093.pub2. PMID15674874.
Conterno, LO (19 July 2006). “Conjugate vaccines for preventing meningococcal C meningitis and septicaemia.”. The Cochrane database of systematic reviews (3): CD001834. doi:10.1002/14651858.CD001834.pub2. PMID16855979.
Patel, M (25 January 2005). “Polysaccharide vaccines for preventing serogroup A meningococcal meningitis.”. The Cochrane database of systematic reviews (1): CD001093. doi:10.1002/14651858.CD001093.pub2. PMID15674874.
Conterno, LO (19 July 2006). “Conjugate vaccines for preventing meningococcal C meningitis and septicaemia.”. The Cochrane database of systematic reviews (3): CD001834. doi:10.1002/14651858.CD001834.pub2. PMID16855979.