Estimating vaccination coverage in the absence of immunisation registers – the German experience
Siedler, A and Rieck, T and Reuss, A and Walter, D and Poggensee, G and Poethko-Müller, C and Reiter, S, Eurosurveillance, 17, 20152 (2012), https://doi.org/10.2807/ese.17.17.20152-en