1. World Health Organization. Vaccine-preventable diseases: monitoring system 2013 global summary [Internet]. Geneva (Switzerland): World Health Organization; c2013. WHO-UNICEF Estimates of BCG Coverage. 2013 Jul 14 [cited 2014 May 20]; [about 3 screens]. Available from: http://apps.who.int/immunization_monitoring/en/globalsummary/timeseries/tswucoveragebcg.html
2. Knezevic I, Corbel MJ. WHO discussion on the improvement of the quality control of BCG vaccines. Pasteur Institute, Paris, France, 7 June 2005. Vaccine.
3. WHO discussion on the improvement of the quality control of BCG vaccines
4. World Health Organization. Expert committee on biological standardization. Requirements for dried BCG vaccine. 1987, WHO Technical Report Series No. 745; 60–92.