New features of rubella in Spain: the evidence of an outbreak
Lemos, C and Ramirez, R and Ordobas, M and Guibert, D H and Sanz, J C and Garcia, L and Martinez Navarro, J. F., Eurosurveillance, 9, 463 (2004), https://doi.org/10.2807/esm.09.04.00463-en