Patel, M; Lee, CK. Polysaccharide vaccines for preventing serogroup A meningococcal meningitis.. The Cochrane database of systematic reviews. 25 January 2005, (1): CD001093. PMID 15674874.
Conterno, LO; Silva Filho, CR; Rüggeberg, JU; Heath, PT. Conjugate vaccines for preventing meningococcal C meningitis and septicaemia.. The Cochrane database of systematic reviews. 19 July 2006, (3): CD001834. PMID 16855979.