1. World Health Organization. Global measles and rubella strategic plan: 2012–2020. 2012. http://apps.who.int/iris/bitstream/10665/44855/1/9789241503396_eng.pdf Accessed 15 February 2018
2. World Health Organization Regional Office for Europe (WHO Europe). Fifth Meeting of the European Regional Verification Commission for Measles and Rubella Elimination (RVC). 24–26 October 2016, Copenhagen, Denmark. http://www.euro.who.int/__data/assets/pdf_file/0005/330917/5th-RVC-meeting-report.pdf?ua=1 Accessed 15 July 2019.
3. World Health Organization. Regional office for Europe. The European Vaccine Action Plan 2015–2020. http://www.euro.who.int/__data/assets/pdf_file/0007/255679/WHO_EVAP_UK_v30_WEBx.pdf?ua=1 Accessed 20 August 2019.