1. Eastern and Southern Africa EPI Managers Meeting, Harare, 21–24 March 2011.
2. Impact of conjugate Haemophilus influenzae type b (Hib) vaccine introduction in South Africa;Von Gottberg;Bulletin of the World Health Organization,2006
3. World Health Organization. Immunisation, Vaccines and Biologicals. Vaccine Introduction Guidelines. Adding a vaccine to a national immunisation programme: decision and implementation. Ordering Code; WHO/IVB/05.18.
4. Cost effectiveness of pediatric pneumococcal conjugate vaccines: a comparative assessment of decision making tools;Chaiyakunapruk;BioMed Central,2011
5. A global look at national Immunization Technical Advisory Groups;Bryson;Vaccine,2010