Early estimates of the excess mortality associated with the 2008-9 influenza season in Portugal
Nogueira, P J and Nunes, B and Machado, A and Rodrigues, E and Gómez, V and Sousa, L and Falcão, J M, Eurosurveillance, 14, 19194 (2009), https://doi.org/10.2807/ese.14.18.19194-en