Lessons learnt to keep Europe polio-free: a review of outbreaks in the European Union, European Economic Area, and candidate countries, 1973 to 2013
Derrough, Tarik and Salekeen, Alexandra, Eurosurveillance, 21, 30210 (2016), https://doi.org/10.2807/1560-7917.ES.2016.21.16.30210